A hamster may fit in your hand.

Their world should not.

For decades, hamsters have often been kept in tiny cages with:

a food bowl, a plastic house, a small wheel,

and very little else.

We now understand much more about what hamsters actually need.

In the wild, hamsters dig burrows, build nests, forage for food, travel considerable distances and maintain complex underground spaces. Modern veterinary guidance recommends deep bedding suitable for burrowing, while welfare organisations emphasise large floor areas, hiding places, enrichment and appropriately sized wheels.

So good hamster care begins with a different question.

Not:

“What can I fit inside a hamster cage?”

But:

“How can I give this animal opportunities to behave like a hamster?”

Quick hamster care checklist

HOME

• Large uninterrupted floor area
• Secure enclosure and lid
• Deep burrow-supporting bedding
• Dark nesting area
• Multiple hiding places
• Quiet location
• Stable comfortable temperature

EXERCISE & ENRICHMENT

• Correctly sized solid-surface wheel
• Tunnels
• Foraging opportunities
• Safe gnawing materials
• Different textures/substrates
• Space to explore

FOOD & WATER

• Complete balanced hamster food
• Appropriate small amounts of fresh foods
• Fresh water continuously available
• Food stores checked without unnecessary disturbance

HEALTH

• Eating normally
• Drinking normally
• Droppings normal
• Weight stable
• Eyes/nose clear
• Breathing comfortable
• Coat/skin normal
• Teeth not interfering with eating
• Moving normally
• Behaviour normal

ROUTINE

• Sleeps undisturbed during the day
• Gentle handling when awake
• Spot cleaning as needed
• Veterinarian identified
• Emergency provider identified

1. First, know which hamster you have

“Hamster” is not one uniform pet.

Common companion species include:

Syrian hamster

Mesocricetus auratus

Larger-bodied and naturally solitary.

Chinese hamster

Cricetulus griseus

Smaller and also naturally solitary.

Roborovski dwarf hamster

Phodopus roborovskii

Very small, fast and often less suited to frequent handling.

Campbell's dwarf hamster

Phodopus campbelli

A dwarf hamster species with its own husbandry considerations.

Winter white dwarf hamster

Phodopus sungorus

Another commonly kept dwarf species.

Species matters because it can affect:

• adult size;
• wheel size;
• enclosure setup;
• handling;
• social behaviour;
• health risks.

The 1KAHU profile should therefore record:

Hamster → Species

not simply:

Small Pet → Hamster.

2. Hamsters need space

Small animal does not mean:

small home.

Hamsters use horizontal space to:

• explore;
• forage;
• run;
• investigate;
• create different functional areas.

PDSA notes that many commercially sold hamster cages are too small and cites 100 × 50 cm as a welfare-based minimum floor-area benchmark, while emphasising that larger is better.

For 1KAHU, I would phrase this carefully:

Aim for a large, single-level enclosure with substantial uninterrupted floor space rather than assuming a small pet-shop cage is adequate. Current welfare guidance commonly uses around 100 × 50 cm as a minimum benchmark, but more usable space can provide additional behavioural choice.

This avoids presenting one organisation's threshold as a universal veterinary law.

3. Floor space matters more than height

A tall enclosure with:

five tiny shelves

does not necessarily provide the same welfare value as:

one generous continuous floor area.

Hamsters are primarily ground-dwelling and burrowing animals.

They also have relatively poor eyesight and can be injured by falls. PDSA therefore favours larger single-level environments over tall multi-level cages.

The enclosure still needs enough height for:

• deep bedding;
• a correctly sized wheel;
• hides;
• enrichment.

But height should not substitute for usable floor area.

4. Deep bedding is fundamental

One of the biggest improvements a new guardian can make is:

give the hamster enough substrate to burrow.

Hamsters do not simply enjoy digging.

They are adapted to:

living in burrows.

Modern Merck professional guidance recommends deep bedding and notes that 40–80 cm of bedding can enhance welfare in Syrian hamsters. PDSA recommends that the enclosure accommodate at least 25 cm / 10 inches of bedding.

These figures illustrate something important:

A thin layer covering the cage floor does not meet the behavioural purpose of bedding.

5. Bedding should hold a burrow

Depth alone is not enough.

The hamster needs to be able to create tunnels that remain reasonably stable.

Suitable setups can incorporate materials such as:

• good-quality paper-based bedding;
• appropriate dust-free substrates;
• soft hay mixed through bedding to add structure.

PDSA specifically recommends deep substrate capable of holding burrows.

The goal is to let the hamster create:

their own architecture.

6. Avoid fluffy nesting material

Products labelled:

“hamster bedding”

are not automatically safe.

Cotton wool and similar fluffy fibre nesting products can become tangled around limbs and may cause serious problems if swallowed. Both PDSA and the RSPCA warn against these materials.

Safer nesting materials include appropriate:

• shredded paper;
• plain tissue;
• cardboard;
• suitable hay.

Give the material to the hamster.

Let them:

build the nest.

7. Hamsters need darkness and privacy

A hamster should be able to disappear from view.

That means providing:

• nesting chambers;
• hides;
• tunnels;
• deep bedding.

RSPCA guidance recommends a dark nesting box large enough for the hamster to sleep, move comfortably and create a food store.

Privacy is not an aesthetic inconvenience.

For a prey animal, it is:

security.

8. Do not destroy the nest every few days

Hamsters rely heavily on scent.

Their burrow and nest are part of their:

safe territory.

Over-cleaning can therefore create unnecessary stress.

The RSPCA recommends balancing hygiene against excessive disturbance, using spot cleaning between deeper cleans and retaining some clean, familiar bedding when appropriate.

So:

Clean what needs cleaning without repeatedly resetting the hamster's entire world.

9. Check food stores carefully

Hamsters hoard food.

That is normal.

They may carry food in their cheek pouches and create stores in:

• nests;
• tunnels;
• corners;
• underground chambers.

Do not automatically remove every stored pellet because it looks:

messy.

But inspect stores for:

• spoiled fresh food;
• mould;
• dampness;
• contamination.

Remove food that could become unsafe.

10. Hamsters need a proper wheel

A wheel can provide valuable exercise.

But only if it fits.

The wheel should have:

a solid running surface

rather than bars or mesh that can trap or injure feet. Merck specifically recommends a solid-surface wheel large enough for free movement and easy entry and exit.

The hamster should be able to run without the back being forced into an exaggerated curve.

11. Wheel size depends on the hamster

PDSA currently recommends approximately:

at least 20 cm / 8 inches for dwarf hamsters

and

at least 30 cm / 12 inches for Syrian hamsters.

But rather than hard-coding only a diameter into 1KAHU, the better rule is:

The wheel must be large enough for the individual hamster to run comfortably with a natural body position.

A particularly large Syrian may need:

more than the nominal minimum.

12. A wheel does not replace an enriched enclosure

Running is only one behaviour.

Hamsters also need opportunities to:

• dig;
• burrow;
• forage;
• investigate;
• gnaw;
• hide;
• nest;
• explore.

A hamster that has:

a wheel in an otherwise empty box

does not have a complete environment.

13. Avoid hamster exercise balls

The traditional transparent hamster ball remains common.

I would not recommend it in the Academy.

A hamster confined inside a ball cannot freely:

• hide;
• leave;
• access water;
• investigate using normal touch and scent;
• choose when to stop.

Instead, provide exercise through:

a large enriched enclosure + correctly sized wheel + safe supervised exploration where appropriate.

This is a good example of the Academy being willing to move away from outdated “classic hamster ownership” imagery.

14. Give your hamster opportunities to forage

In nature, food does not arrive every evening in:

one ceramic bowl.

PDSA recommends enrichment methods such as:

• scattering pellets;
• hiding food in bedding;
• using cardboard tubes;
• hiding appropriate foods in paper bags or boxes.

This converts feeding into:

behaviour.

Instead of:

bowl → eat

the hamster can:

search → investigate → dig → find → carry → store → eat.

That is much richer.

15. Hamsters need things to gnaw

Hamster incisors grow continuously.

Safe gnawing opportunities support:

• normal behaviour;
• dental wear;
• enrichment.

Suitable items can include species-appropriate:

• untreated safe wood;
• cardboard;
• gnawing materials.

If teeth become:

• overgrown;
• misaligned;
• damaged;

or the hamster struggles to eat:

contact a veterinarian.

Do not attempt major dental correction yourself.

16. Hamsters are omnivores

Unlike guinea pigs and rabbits, hamsters are not strict herbivores.

Wild hamsters consume a mixture of:

• plant material;
• seeds;
• vegetation;
• some animal protein.

Current veterinary guidance recommends a complete, balanced commercial diet formulated appropriately for hamsters rather than allowing selective eating from an unbalanced seed mixture.

17. The core diet should be nutritionally complete

A quality commercial hamster food should provide the nutritional foundation.

Pelleted or otherwise nutritionally complete formulations can help prevent the hamster from eating only:

their favourite high-fat or high-sugar pieces.

PDSA similarly cautions against relying exclusively on muesli-style mixes because hamsters can selectively eat preferred components.

This does not mean enrichment must disappear.

Use:

foraging and scatter feeding

to make nutritionally appropriate food interesting.

18. Fresh food can provide variety

Small amounts of appropriate:

• vegetables;
• herbs;
• occasional fruit;
• suitable protein foods

can add variety.

PDSA suggests small portions and cautions against excessive sugary foods, particularly because some dwarf hamsters can be prone to diabetes.

Article 51 — Hamster Nutrition: What Should a Hamster Eat? — should later own the detailed food list.

This article should stay at:

principle level.

19. Treats should remain treats

Nuts, seeds and some fruits can be:

highly rewarding.

They can also be:

energy dense.

Avoid building a diet around treats simply because:

“My hamster likes them.”

Preference does not equal nutritional balance.

20. Fresh water should always be available

Hamsters need constant access to:

clean fresh water.

Check the water source every day.

If using a bottle:

• make sure it is not blocked;
• check that water actually flows;
• clean it regularly.

Merck recommends regular cleaning and sanitising of water containers, usually daily.

A full bottle does not help if:

the mechanism does not work.

21. Most hamsters should live alone

This is one of the biggest differences from the guinea pig article.

Guinea pigs generally benefit from compatible guinea pig companionship.

Hamsters are different.

PDSA currently recommends housing pet hamsters separately, noting that most species are solitary and that even domesticated dwarf hamsters can develop dominance problems and fight.

Merck similarly states that, outside breeding, single housing is safest.

So the simple new-guardian rule should be:

Plan for one hamster per enclosure.

22. Syrian hamsters must live alone

Adult Syrian hamsters are naturally solitary.

Housing two together can result in:

• fighting;
• severe injury;
• death.

The RSPCA specifically advises that Syrian hamsters should live alone.

Do not assume:

“They've grown up together, so they'll always be fine.”

23. Chinese hamsters should also live alone

Chinese hamsters are also naturally solitary and should be individually housed.

Again:

species matters.

24. What about dwarf hamsters?

This is where online guidance can become confusing.

Some dwarf hamster species can sometimes coexist in carefully managed same-species groups under appropriate conditions. The RSPCA acknowledges this while also warning that groups can later break down and guardians must be prepared to separate them.

PDSA takes the more conservative pet-care position:

house them separately.

For a beginner-facing 1KAHU guide, I recommend the safer default:

House pet hamsters individually. If you are considering keeping dwarf hamsters together, seek species-specific expert advice and be prepared for immediate permanent separation if conflict occurs.

Do not encourage beginners to:

“get two so they don't get lonely.”

25. Do not mix hamster species

Never create a mixed:

Syrian + dwarf

or other multi-species hamster household within one enclosure.

The RSPCA strongly advises against mixing hamster species.

26. Hamsters are active when we often want to sleep

Hamsters naturally spend much of the day resting and become more active:

toward evening and overnight.

PDSA describes them as sleeping during the day and being active in the evening/night.

That means guardians need to adapt.

Do not repeatedly wake the hamster at:

2 PM

because that is when the children want to play.

27. Let sleeping hamsters sleep

Being pulled from a nest while asleep can:

• frighten;
• stress;
• provoke defensive biting.

Interact when the hamster is:

naturally awake.

This also makes handling more likely to become a positive experience.

28. Put the enclosure somewhere quiet

Hamsters can be sensitive to:

• noise;
• vibration;
• unpredictable disturbance;
• bright sunlight.

RSPCA recommends a quiet, dry location away from drafts, direct sun and sources of ultrasound/high-frequency noise.

Avoid placing the enclosure:

• beside a television;
• next to a washing machine;
• in direct sunlight;
• in a constantly busy corridor.

29. Keep the temperature stable

PDSA recommends a stable environment around 18–21°C and warns that excessive cold can contribute to torpor while overheating can cause heatstroke.

The practical principle is:

stable + dry + draft-free + away from direct sun.

Do not position an enclosure where the temperature changes dramatically during the day.

30. Torpor is not “cute hibernation”

A cold hamster may become:

• extremely inactive;
• cold;
• difficult to rouse.

This can be mistaken for:

death

or:

normal hibernation.

Pet hamsters should not be deliberately encouraged into torpor or hibernation.

If your hamster becomes unexpectedly cold and unresponsive:

contact a veterinarian promptly for guidance.

Do not rely on internet videos to determine whether the hamster is:

hibernating, critically ill or dead.

31. Handling should be gradual

Hamsters are prey animals.

A hand suddenly descending from above can be frightening.

Start by allowing the hamster to:

• hear you;
• smell you;
• investigate your hand;
• associate interaction with calm experiences.

When comfortable, gently:

cup with both hands

rather than grabbing. The RSPCA recommends this approach and advises holding hamsters over a safe surface because falls can cause injury.

32. Never squeeze or scruff a pet hamster casually

Hamsters are small and physically delicate.

Rough handling can cause:

• injury;
• fear;
• defensive biting.

PDSA specifically warns that rough handling, squeezing, dropping or scruffing can contribute to serious eye injury, including eye prolapse.

Children should therefore always be supervised by a responsible adult.

33. A hamster is not automatically a good “children's starter pet”

Hamsters are:

• small;
• inexpensive relative to some pets;
• commonly marketed to children.

But their needs can conflict with what young children expect.

They sleep during the day.

They can move quickly.

They are fragile.

They may bite when frightened.

The RSPCA explicitly states that hamster needs are complex and that an adult should be responsible for ensuring their care.

A better description is:

A small animal requiring adult-quality care.

34. Learn what normal looks like

Small mammals can deteriorate quickly.

Learn your hamster's normal:

• appetite;
• water intake;
• activity;
• body weight;
• droppings;
• movement;
• breathing;
• coat;
• behaviour.

Then you can notice:

change.

35. Monitor body weight

Because hamsters are:

• small;
• furry;
• often active at night;

gradual weight change may not be visually obvious.

A suitable gram scale can help establish a trend.

Record:

date + weight + relevant context.

For example:

Date	Weight
3 Aug	154 g
10 Aug	153 g
17 Aug	149 g
24 Aug	143 g

One measurement says:

143 g.

The timeline says:

weight is falling.

That is far more useful.

36. Do not compare weight with random internet charts

A healthy weight depends on:

• species;
• sex;
• body size;
• age;
• individual build;
• health.

A Syrian hamster and a Roborovski hamster obviously cannot share the same:

“healthy hamster weight.”

Ask your veterinarian to help establish an individual baseline.

37. Check eating and food stores

Because hamsters hoard food, it can sometimes be difficult to know how much has actually been eaten.

Monitor:

• interest in food;
• ability to chew;
• weight;
• food stores;
• droppings.

Reduced eating can accompany:

• dental disease;
• gastrointestinal disease;
• pain;
• systemic illness.

If the hamster is eating significantly less:

contact a veterinarian.

38. Monitor the teeth

Hamster incisors grow continuously.

Watch for:

• difficulty eating;
• drooling;
• weight loss;
• food falling from the mouth;
• visibly abnormal incisors;
• facial swelling.

PDSA identifies overgrown teeth as a common hamster health problem that can cause pain, difficulty eating, weight loss and drooling.

Do not attempt significant DIY dental correction.

39. Monitor the eyes

Look for:

• discharge;
• swelling;
• redness;
• cloudiness;
• an eye being kept closed;
• protrusion.

A protruding eye is:

an emergency.

PDSA specifically identifies eye prolapse in hamsters as requiring emergency veterinary care.

40. Monitor breathing

Breathing should appear:

comfortable and quiet.

Watch for:

• laboured breathing;
• unusual noises;
• nasal discharge;
• reduced activity associated with breathing changes.

PDSA notes that respiratory signs in hamsters can accompany conditions such as respiratory infection or heart disease and can occur alongside lethargy and appetite loss.

Breathing difficulty deserves prompt veterinary attention.

41. Monitor the coat and skin

Look for:

• bald areas;
• excessive scratching;
• crusting;
• wounds;
• swelling;
• new lumps;
• unexplained coat deterioration.

Skin changes can have many causes.

Do not automatically assume:

mites

and apply a pet-store treatment.

Get the cause assessed.

42. Check lumps

Hamsters can develop:

• abscesses;
• cysts;
• tumours;
• other swellings.

PDSA recommends having new lumps assessed because earlier diagnosis can improve treatment options.

Record:

• when you first noticed it;
• location;
• change in size;
• photo if useful.

Do not:

squeeze it.

43. Watch the rear end and droppings

Diarrhoea in hamsters can become serious quickly.

The term:

“wet tail”

is often used loosely, but a wet or soiled rear is a:

sign

not a complete home diagnosis.

PDSA notes that diarrhoea can have different causes and may be accompanied by:

• reduced appetite;
• lethargy;
• dehydration;
• rapid deterioration.

If your hamster develops diarrhoea or a persistently wet/soiled rear:

contact a veterinarian promptly.

44. Do not diagnose every diarrhoea case as “wet tail”

This is important for AI Guardian.

A user may type:

“My hamster has wet tail.”

The system should understand:

the guardian is describing a symptom/colloquial condition

rather than treating that as a confirmed diagnosis.

Better:

“A wet or diarrhoeic rear can be associated with several conditions and hamsters can dehydrate quickly. Contact a veterinarian promptly.”

Not:

“Your hamster has proliferative ileitis.”

45. Medication requires species-specific veterinary advice

Do not give:

• human medicines;
• leftover antibiotics;
• another pet's medication;
• over-the-counter creams

without veterinary advice.

Merck warns that certain antibiotics can cause serious digestive problems in hamsters and advises against using antibiotic-containing products without specific veterinary direction.

Small mammal does not mean:

small dose of dog medicine.

46. Find a hamster-experienced veterinarian before you need one

Ask your practice:

• Do you routinely see hamsters?
• Which veterinarian sees small mammals?
• Where should I go out of hours?
• Do you manage dental problems?
• Can you provide imaging/surgery if needed?
• Where do you refer complex exotic cases?

Save:

routine + emergency contacts

before there is a crisis.

47. Preventive care still matters

Hamsters generally do not have the routine vaccination schedule familiar from dogs or cats.

But preventive healthcare still includes:

• appropriate husbandry;
• nutrition;
• weight monitoring;
• dental observation;
• skin health;
• injury prevention;
• veterinary assessment when changes occur.

Merck emphasises adequate housing, good nutrition and preventive care as important foundations of hamster health.

48. Escape prevention is healthcare

Hamsters are extraordinary escape artists.

A loose hamster can encounter:

• falls;
• electrical cables;
• toxic substances;
• other pets;
• furniture;
• inaccessible spaces.

Merck describes preventing escape as one of the most important practical steps in routine hamster healthcare because escaped hamsters can be seriously injured.

Check:

• doors;
• lids;
• bar spacing;
• gaps;
• damaged clips;
• tunnel connections.

The 60-second daily hamster check

This should become the primary reusable checklist in the app.

APPETITE

Eating normally?

Yes / Reduced / Not eating / Unsure

WATER

Drinking normally?

Yes / Increased / Reduced / Unsure

DROPPINGS

Normal?

Yes / Changed / Diarrhoea / None observed

ACTIVITY

Normal when awake?

Yes / Reduced / Very quiet

MOVEMENT

Normal?

Yes / Changed / Limping

BREATHING

Comfortable?

Yes / Changed / Laboured

APPEARANCE

Eyes / nose / coat / rear normal?

Yes / Changed

BEHAVIOUR

Normal?

Yes / Changed

The phrase:

“when awake”

matters.

A hamster sleeping at midday should not be recorded by AI Guardian as:

“abnormally lethargic.”

Species and circadian context matter.

Weekly hamster check

When your hamster is naturally awake:

• Record weight
• Review weight trend
• Observe eating
• Check eyes and nose
• Check coat and skin
• Check rear end
• Observe teeth/eating ability
• Observe movement
• Check nails/feet where possible without stressful restraint
• Check wheel condition
• Check water system
• Inspect bedding for dampness
• Remove spoiled stored fresh food
• Check enclosure security

When should you contact a veterinarian?

Contact a hamster-experienced veterinarian promptly for changes such as:

• reduced appetite;
• unexplained weight loss;
• diarrhoea;
• wet/soiled rear;
• altered drinking;
• breathing changes;
• eye discharge;
• nasal discharge;
• difficulty eating;
• drooling;
• overgrown/damaged teeth;
• skin lesions;
• significant hair loss;
• new lumps;
• wounds;
• lameness;
• unusual inactivity when normally awake;
• major behaviour change.

Hamsters can show subtle signs of pain and illness, so changes in normal appearance or behaviour deserve attention.

When is it an emergency?

Seek urgent veterinary care for signs such as:

BREATHING

Severe breathing difficulty.

NEUROLOGICAL

Collapse, seizure, severe weakness or unresponsiveness.

TRAUMA

Major injury, significant bleeding or suspected fracture.

EYE

Protruding/prolapsed eye.

GASTROINTESTINAL

Severe diarrhoea accompanied by weakness, dehydration or rapid deterioration.

TEMPERATURE

Suspected severe overheating or a cold, profoundly unresponsive hamster where torpor or serious illness may be possible.

TOXIN

Known or suspected poisoning.

GENERAL CONDITION

A hamster that is rapidly deteriorating or clearly seriously unwell.

Small body size means:

there may be less margin for prolonged “wait and see.”

Common hamster-care mistakes

“Hamsters are tiny, so they only need a tiny cage.”

No.

They need meaningful horizontal space and sufficient depth to burrow.

“A couple of centimetres of bedding is enough.”

No.

Burrowing requires genuine depth.

“Fluffy cotton bedding looks comfortable.”

Avoid it. Fibrous fluffy nesting material can cause entanglement and other serious problems.

“Two hamsters will keep each other company.”

Usually the opposite.

Single housing is the safest default, and Syrian and Chinese hamsters should live alone.

“My Syrian hamsters are siblings, so they'll be fine together.”

Adult Syrians are solitary.

Being siblings does not remove the risk of serious fighting.

“My hamster sleeps all day, so something is wrong.”

Not necessarily.

Hamsters naturally rest during much of the day and become active later.

“I'll wake them so the children can play.”

Repeatedly disturbing daytime sleep conflicts with the hamster's natural rhythm.

“Any wheel will do.”

No.

It needs a solid surface and sufficient diameter for natural running posture.

“The hamster ball gives them freedom.”

I would avoid it. Provide genuine choice through an enriched enclosure and safe exploration instead.

“Seed mix is enough.”

A selective hamster may preferentially eat favourite components and leave others, potentially unbalancing the diet.

“I need to throw away every food stash.”

No.

Hoarding is normal. Remove spoiled or unsafe food while avoiding unnecessary destruction of the hamster's environment.

“The cage should smell completely new after every clean.”

Not necessarily.

Hamsters rely heavily on scent. Excessive environmental disruption can cause stress.

“Wet tail is one disease I can treat at home.”

A wet/diarrhoeic rear can have different causes, and dehydration can develop rapidly. Seek veterinary care.

“I can give a tiny amount of my other pet's antibiotic.”

No.

Some antibiotics can be dangerous to hamsters.

Key facts

Hamsters need large usable floor areas despite their small size.

Deep bedding is a core welfare requirement because hamsters are natural burrowers. Modern professional guidance reports welfare benefits from very deep substrate in Syrian hamsters.

Hamsters need a dark, secure nesting area.

Avoid fluffy cotton-style nesting materials. They can cause dangerous entanglement and ingestion problems.

The wheel should have a solid running surface and be large enough for natural posture.

Most pet hamsters should live alone. Syrian and Chinese hamsters should be individually housed.

Hamsters are primarily active in the evening and at night.

Hoarding food is normal hamster behaviour.

A complete balanced diet should form the nutritional foundation.

Fresh water must always be available.

Diarrhoea can cause rapid dehydration.

Some antibiotics can be dangerous for hamsters. Never medicate without veterinary direction.

Frequently asked questions

Are hamsters easy pets for beginners?

Their small size makes them manageable in some respects, but their needs are more complex than the traditional “starter pet” label suggests. They require substantial housing, deep bedding, enrichment, species-appropriate food, appropriate handling and access to veterinary care. The RSPCA specifically notes that their care needs can be complex.

How big should a hamster cage be?

PDSA currently cites 100 × 50 cm as a minimum welfare benchmark while emphasising that larger is better. Prioritise uninterrupted horizontal floor area and enough height for deep bedding and a properly sized wheel.

How deep should hamster bedding be?

PDSA recommends accommodating at least 25 cm / 10 inches for burrowing, while professional Merck guidance notes that substantially deeper bedding—approximately 40–80 cm—can enhance Syrian hamster welfare.

What bedding is best for hamsters?

Use safe, low-dust material capable of supporting burrows, such as appropriate paper-based bedding, sometimes combined with safe hay or other suitable substrate. Avoid fluffy fibre nesting products.

Can I use cotton wool bedding?

No. Welfare organisations warn that fluffy fibre bedding can entangle limbs and can cause serious problems if swallowed.

Should hamsters live alone?

For a beginner guardian, individual housing is the safest default. Syrian and Chinese hamsters should live alone. Some dwarf species can sometimes coexist under carefully managed conditions, but even established groups may fight.

Do hamsters get lonely?

Hamsters do not need a hamster companion in the way guinea pigs generally do. PDSA specifically notes that pet hamsters do not need another hamster to be happy.

Can two Syrian hamsters live together?

No. Adult Syrian hamsters are naturally solitary and should be housed separately.

Can dwarf hamsters live together?

Some dwarf species can sometimes coexist, but fighting and dominance problems can develop, even after apparently peaceful periods. For new guardians, individual housing is the safer recommendation.

What size wheel does my hamster need?

The wheel must allow natural running without forcing the back into an exaggerated curve. PDSA recommends at least approximately 20 cm for dwarf hamsters and 30 cm for Syrian hamsters, but larger individuals may require larger wheels.

Should a hamster wheel have bars?

No. Use a solid running surface to reduce the risk of feet or limbs becoming trapped.

Should hamsters use exercise balls?

I would avoid them. A spacious enriched environment, correctly sized wheel and safe supervised exploration provide better opportunities for voluntary exercise and normal behaviour.

What do hamsters eat?

A nutritionally complete hamster-appropriate commercial diet should form the foundation, with suitable fresh foods and treats in small amounts. Hamsters are omnivores.

Why does my hamster hide food?

Hoarding is normal. Hamsters use their cheek pouches to transport food and create stores for later.

Should I remove my hamster's food stash?

Remove spoiled, mouldy or wet fresh food, but avoid unnecessarily destroying safe dry stores every time you clean.

Why does my hamster sleep all day?

Hamsters normally spend much of the daytime asleep and become more active in the evening and overnight.

Should I wake my hamster during the day?

Generally no. Allow the hamster to follow its normal sleep pattern and interact when it wakes naturally.

Can children hold hamsters?

Yes, with appropriate supervision, but hamsters are fragile and can move quickly. An adult should remain responsible for their welfare and handling.

How often should I clean the enclosure?

Spot-clean soiled areas regularly and perform deeper cleaning according to enclosure size and need. Avoid excessive full resets. The RSPCA notes that many setups may need deep cleaning only once or twice monthly, with more frequent spot cleaning.

What is wet tail?

The term is commonly used for diarrhoeal illness in hamsters, but a wet or soiled rear can have different causes. Because hamsters can dehydrate rapidly, diarrhoea requires prompt veterinary attention.

Does my hamster need vaccinations?

Pet hamsters generally do not follow a routine vaccination programme like dogs or cats. Preventive healthcare still matters.

How often should my hamster see a veterinarian?

There is no single universal interval appropriate to every hamster. Establish care with a veterinarian experienced in small mammals and follow their advice based on your hamster's species, age and health.

Why is my hamster suddenly not eating?

Dental disease, gastrointestinal disease, pain and other illnesses can reduce appetite. A meaningful reduction in eating—especially with other changes such as weight loss, diarrhoea or lethargy—warrants prompt veterinary advice.

The hamster's environment is part of their health record

Consider a Syrian hamster called:

MOCHI

Species

Syrian hamster

Housing

120 × 60 cm

Bedding

30 cm deep

Wheel

32 cm solid surface

Housing

Single

Normal active period

20:00–05:00

Weight baseline

162 g

Normal appetite

Good

Normal behaviour

Active / burrowing / foraging

Now imagine the guardian records:

MONDAY

Weight 162 g Eating normally Active overnight

THURSDAY

Weight 157 g Eating slightly less

SATURDAY

Weight 151 g Food store smaller Quieter when awake

SUNDAY

Weight 148 g Reduced appetite

A generic pet platform sees:

Hamster — 148 g

A species-aware platform sees:

Mochi has lost weight across multiple entries and his appetite and normal evening activity have also changed.

That is the difference between:

storing pet data

and:

understanding care context.

1KAHU

Built around the hamster—not adapted from the guinea pig.

The previous article demonstrates that a guinea pig profile should prioritise:

hay + vitamin C + companionship + droppings.

The hamster profile should be different.

IDENTITY

Name Species Sex Date of birth / estimated age Colour / markings Weight baseline

ENVIRONMENT

Enclosure dimensions Bedding depth Bedding type Wheel size/type Nest/hides Temperature considerations

SOCIAL

Individually housed

or, only where applicable:

Group/pair details

NUTRITION

Primary diet Fresh foods Treats Food-storage behaviour Water

HEALTH

Weight Dental history GI history Skin Eyes Respiratory history Lumps/tumours Medication

BASELINE

Appetite Drinking Droppings Active hours Activity level Behaviour

PROFESSIONALS

Primary veterinarian Small-mammal/exotics veterinarian Emergency provider

One Guardian. For All Pets.

1KAHU is a technology platform and is not a provider of veterinary or healthcare services. This guide provides general educational information and does not replace individual veterinary advice. Hamster needs vary by species, age, health and environment. Contact a veterinarian experienced with hamsters or small mammals if your hamster appears unwell or their normal behaviour, eating, drinking, droppings or appearance changes.