How to look after a hamster: a care guide

Hamsters are small, but they are not simple pets. A well-kept hamster can be a genuinely rewarding animal to watch and handle, and getting the basics right from day one makes a huge difference to how settled and healthy they are.

This guide covers the essentials: choosing the right type of hamster, setting up a proper home, feeding, handling, and spotting the health problems every owner should know about. None of it is complicated, but hamsters have specific needs that are easy to get wrong if you're going on guesswork or outdated pet shop advice.

If you're still deciding whether a hamster is the right pet for your household, our Pet Ownership Quiz can help you think through the commitment before you bring one home.

Choosing the right hamster

Not all hamsters are the same, and the species you choose affects almost everything else about their care.

Syrian hamsters are the largest and most commonly kept in the UK. They are strictly solitary – the RSPCA is clear that Syrian and Chinese hamsters are not suited to living together and can be aggressive towards their own kind, so a Syrian hamster should always be housed alone.

Dwarf species, including Roborovski, Campbell's Russian and Winter White hamsters, are smaller and faster-moving. Some dwarf hamsters can occasionally live in compatible same-sex pairs or small groups if introduced correctly when young, but fighting is common and unplanned litters happen easily if sexes are mixed. If you're at all unsure, the safest and lowest-stress option – for you and the hamster – is to keep one hamster per cage.

Lifespan is also worth knowing before you commit: PDSA notes that hamsters typically live for two to three years, with larger Syrian hamsters generally living a little longer than smaller dwarf varieties. That's a short commitment compared with a cat or dog, but it's still a real one, and short lifespans are exactly why good care matters from the start.

Housing: cage size and setup

Hamsters are natural burrowers, and their home needs to reflect that. PDSA recommends a minimum cage footprint of 100cm x 50cm, with bigger considered better – floor space matters far more than height, since hamsters are ground-dwelling and don't use vertical space the way some other small pets do.

The RSPCA's guidance on cage type is specific: plastic or glass cages/tanks work better than metal, and wooden cages should be avoided altogether since they're harder to clean and can be gnawed through. Whatever the cage material, it needs a solid floor (never wire mesh, which can injure feet) and a secure, raised lid.

An aquarium-style tank is often a good choice because it allows for a genuinely deep layer of substrate. PDSA suggests at least 25cm (10 inches) of bedding so your hamster can dig and create its own burrow system – this is a core part of natural hamster behaviour, not an optional extra.

Temperature and environment

PDSA recommends keeping hamsters at a stable 18–21°C, away from direct sunlight and draughts. The RSPCA adds that hamsters should be kept somewhere with a consistent light cycle (lights on and off at roughly the same time each day) and away from sources of ultrasound such as televisions and vacuum cleaners, since hamsters are highly sensitive to high-frequency sound that we can't hear.

Bedding and nesting materials

Substrate and nesting material are two different things, and hamsters need both.

For the digging substrate that fills most of the cage, the RSPCA lists suitable options as:

• Dust-free wood shavings
• Granulated corn-cob (preservative-free)
• Coarse sand
• Peat (suitable, though it can discolour lighter fur)

For the nest itself, good options include good-quality hay, wood wool, shredded plain paper, or cardboard.

Avoid cotton wool and other "fluffy" bedding products entirely. The RSPCA warns that thin, fibrous strands can wrap around a hamster's legs and become tangled, leading to injury.

A dark, enclosed nest box positioned near the food area gives your hamster somewhere to feel secure. If you're keeping compatible dwarf hamsters together, the RSPCA advises providing more hiding spaces than the number of hamsters – so a pair needs at least three separate hides – to reduce competition and stress.

Spot-clean the cage every few days, removing old food and soiled bedding, with a fuller deep clean roughly once or twice a month according to RSPCA guidance. Cleaning too often or too thoroughly can actually stress hamsters out, since it removes the scent markers they use to feel secure in their space – little and often beats an occasional total overhaul.

Diet and feeding

Hamsters are omnivores. In the wild they eat a mix of plant material, seeds, and small insects, and their diet in captivity should reflect that variety.

PDSA's guidance on feeding includes:

• A good-quality commercial hamster pellet or mix as the base of the diet
• A small daily portion of fresh fruit, veg and herbs – around a teaspoon or two is enough
• Timothy hay for fibre and dental health
• Occasional protein treats such as mealworms, boiled egg, or a few nuts
• Fresh water available at all times, ideally from a bottle with a metal spout rather than an open bowl

Safe fresh foods include apple, banana, melon, broccoli, carrot and cucumber – all washed first. Portion control matters more than it might seem: hamsters are prone to becoming overweight on too many starchy or sugary extras, and obesity brings the same knock-on health problems in hamsters as it does in any other pet.

It's also worth knowing that hamsters are natural hoarders – the word "hamster" comes from the German for "to hoard" – and the RSPCA notes that Syrian hamsters can carry food in their cheek pouches equivalent to roughly half their own body weight back to their nest. Don't be alarmed if food disappears from the bowl faster than your hamster seems to be eating it; check the nest area occasionally rather than removing the stash, since hoarding is a normal and important behaviour for them, not a sign anything is wrong.

Sleep patterns and daily routine

Hamsters are nocturnal, meaning they sleep through most of the day and are active in the evening and overnight. This is one of the most common reasons hamsters end up mishandled: a hamster woken up mid-sleep is a startled prey animal, and both the RSPCA and PDSA warn that a hamster disturbed while sleeping is far more likely to bite defensively – not out of aggression, but out of alarm.

In practice, this means:

• Let your hamster wake naturally rather than disturbing their nest
• Plan handling, cleaning and playtime for the early evening onward
• Keep the room on a predictable light schedule so their body clock stays stable

If your hamster seems to be adjusting to a strange sleep pattern, or is unusually inactive even in the evening, that's worth monitoring – ill or stressed hamsters can show disrupted activity patterns.

Handling your hamster safely

Good handling technique protects both of you. PDSA's core advice is to cup your hamster gently with both hands, held close to your body, and to sit down while handling them – hamsters have poor depth perception and can be seriously injured by a fall from even a modest height such as a table or sofa arm.

Only handle your hamster when they're awake and calm, and let them come to your hand rather than grabbing at them in their nest. With children, PDSA recommends they're supervised closely, and that younger children are better off feeding treats and gently stroking a hamster in its cage rather than picking it up themselves.

Rough handling carries a real risk beyond a nip: a hamster's eyes are delicate, and squeezing, dropping, or "scruffing" a hamster too firmly can cause an eye to prolapse from its socket. That's a genuine veterinary emergency, not just a scare story, and it's entirely preventable with calm, confident handling.

Enrichment and keeping your hamster active

Boredom is a genuine welfare issue for small pets kept in cages, and hamsters that don't get enough mental and physical stimulation are more prone to obesity, repetitive behaviours, and general poor condition. On top of the deep bedding that allows natural digging, most hamsters benefit from:

• A solid-surface exercise wheel sized appropriately for their species (too small a wheel can strain the back)
• Safe chew toys and gnawing material to help manage tooth wear
• Cardboard tubes, tunnels, and simple hides to explore
• Occasional supervised time in a secure, hamster-proofed space outside the cage

Rotating toys and rearranging tunnels every so often keeps things interesting without disrupting your hamster's whole territory at once.

Common health problems

Because hamsters are small and their metabolism runs fast, they can decline quickly once something goes wrong – so recognising problems early really matters.

Dental issues

A hamster's front teeth grow continuously. The RSPCA advises checking them regularly and asking your vet to look them over, since if one incisor overgrows while its opposite number keeps growing unchecked, it can stop your hamster eating properly.

Wet tail

PDSA describes "wet tail" – diarrhoea, often linked to bacterial infection, a sudden change of food, stress, or gut parasites – as a serious and fast-moving condition, particularly in newly weaned young hamsters. Watch for reduced appetite, lethargy, and a wet or soiled tail area, and treat it as urgent.

Wounds, abscesses and fighting injuries

Abscesses show up as hot, red, painful swellings and often follow a fight (a strong argument for not housing solitary species together) or a cage-related injury. They need veterinary attention – left alone, they can worsen quickly.

Fur loss

Patchy fur loss can have several causes: overgrooming, parasites, fungal infections such as ringworm, or – in older hamsters – more serious underlying conditions. PDSA notes that certain tumours can cause patchy fur loss alongside weight loss and low energy, which is why unexplained fur loss is always worth a vet check rather than a wait-and-see approach.

Lumps and tumours

The RSPCA notes that growths are not uncommon in hamsters, particularly along the underside of the abdomen. Any new lump should be checked by a vet promptly.

Respiratory problems

Laboured or noisy breathing, alongside lethargy and reduced appetite, can point to a lung infection or heart disease and should always be assessed by a vet rather than monitored at home.

One thing that makes hamster illness tricky to catch: PDSA and the RSPCA both note that hamsters don't show obvious signs of pain the way cats or dogs might, so they can be quietly unwell for some time before it becomes visible. Watching for subtle behaviour changes – reduced activity even at their normal active time, less interest in food, or a change in how they move – is often the earliest warning sign you'll get.

When to see your vet

Contact your vet promptly if you notice any of the following:

• Diarrhoea or a wet, soiled tail area
• A new lump, wound, or abscess
• Any eye problem, especially swelling or an eye that looks like it's bulging
• Laboured breathing or unusual lethargy
• Reduced appetite or noticeable weight loss
• Teeth that look overgrown, or trouble eating

Never give a hamster human medication or antibiotics prescribed for another pet – the RSPCA specifically warns that some oral antibiotics that are safe for other animals can cause serious digestive problems in hamsters. Always go through your own vet.

It's also worth knowing that hamsters can pick up human cold viruses, and vice versa – so if you have a cold, it's sensible to keep handling brief and wash your hands well beforehand.

Common mistakes to avoid

A few habits cause a disproportionate number of hamster welfare problems in the UK:

• Cages that are too small. A "starter" cage sold as hamster-sized is very often below the 100cm x 50cm minimum – check dimensions before you buy, not after.
• Housing solitary species together because they "look lonely" – for Syrian and Chinese hamsters, this usually ends in fighting.
• Waking a sleeping hamster for cuddles. It feels affectionate but it's stressful for a nocturnal prey animal and increases the risk of a defensive bite.
• Skimping on bedding depth to keep the cage looking tidy – a shallow layer denies a hamster one of its most important natural behaviours.
• Ignoring subtle changes in appetite or activity, on the assumption that "it's just a hamster." Their fast metabolism means small problems can become serious quickly.

Getting these fundamentals right – the right species for your circumstances, a properly sized and set-up cage, a balanced diet, respectful handling, and quick attention to any change in behaviour – covers almost everything a hamster needs to live a healthy, settled life.

*This is general guidance, not a substitute for advice from your vet, who can assess your individual pet.*

Sources

• RSPCA — keeping hamsters as pets (rspca.org.uk).
• RSPCA — creating a good home for hamsters (rspca.org.uk).
• RSPCA — hamster health and welfare (rspca.org.uk).
• PDSA — hamsters as pets (pdsa.org.uk).
• PDSA — hamster health (pdsa.org.uk).