Hamster Care: A Complete Guide for Owners

Hamsters are small, but their needs are not. They are busy, curious animals that dig, climb, hoard food and run long distances at night. A setup that lets them do these things is the key to a healthy, settled hamster.

Know your species

Several types of hamster are kept as pets, and the differences matter.

• Syrian hamsters (sometimes sold as golden, teddy bear or long-haired hamsters) are solitary as adults. They should always live alone. Housing two together usually ends in serious fighting.
• Dwarf species, such as Roborovski, Campbell's, winter white and Chinese hamsters, are sometimes kept in pairs or small groups. Even so, fighting can happen at any age, sometimes suddenly, and injuries can be severe. Many experienced keepers now prefer to house dwarf hamsters singly too.

If you keep more than one, provide duplicates of everything (hides, wheels, food bowls, water) and have a spare cage ready in case you need to separate them. Research your hamster's species before you bring them home, as care advice varies, and a vet or experienced rescue can help you identify them.

Cage size and setup

Many cages sold for hamsters are too small. Hamsters cover a lot of ground at night, and a cramped cage can lead to stress behaviours such as repeated bar chewing or climbing the cage walls. Choose the largest enclosure you can reasonably fit, with a big continuous floor area rather than lots of small linked tubes. Minimum size recommendations vary between welfare organisations and countries, so treat any figure as a floor, not a target.

Good options include large bin cages, tanks with mesh lids, or bar cages with narrow bar spacing (dwarf hamsters can squeeze through surprisingly small gaps). Keep the cage in a quiet room away from direct sun, radiators, draughts and loud noise, and out of reach of other pets.

Deep bedding for burrowing

Hamsters are natural burrowers. Deep bedding lets them dig tunnels and build nests, which helps them feel secure. Aim for bedding deep enough to hold a burrow in at least part of the cage, using a dust-free, unscented paper-based bedding. Avoid cedar and pine shavings, which can irritate the airways, and fluffy "cotton wool" style bedding, which can tangle around limbs or cause blockages if eaten.

Add a nest box or multi-chamber hide, cork tunnels, sand for bathing or digging (a suitable, dust-free sand, not chinchilla dust), and some unscented paper for nesting. When cleaning, spot-clean the toilet corner often and avoid stripping the whole cage too frequently, as losing all familiar scents can be stressful. Leave some old, clean nesting material behind.

The right wheel

A wheel is essential, as hamsters run long distances at night. It should:

• Have a solid running surface, not rungs or mesh, which can trap feet and cause injuries.
• Be large enough that your hamster runs with a straight back. If their back arches upwards, the wheel is too small. Syrian hamsters need a noticeably bigger wheel than dwarf species.
• Be securely fixed and turn smoothly.

Saucer-style wheels and small plastic exercise balls are generally not recommended, as they can cause injuries and stress.

Nocturnal habits and handling

Hamsters are mostly active in the evening and at night and sleep during the day. Waking them repeatedly is stressful and can make them more likely to bite. Plan interaction for the evening when they are already up.

To build trust, let your hamster sniff your hand and take food from it before trying to pick them up. Scoop them up gently with both hands cupped underneath, or let them walk into a cup or tube. Handle them low down over a soft surface, or while sitting on the floor, because a fall from even a short height can cause injury. Children should be supervised and encouraged to handle calmly.

Diet

A good-quality hamster food made for your hamster's species should form the base of the diet. Scatter-feeding some of it encourages natural foraging. Hamsters hoard food in their nest, so check stores regularly and remove anything fresh that could spoil.

Food	Roughly how much	Notes
Hamster mix or nuggets	A measured daily portion	Choose one suited to your species
Fresh vegetables	A small piece most days	For example broccoli, cucumber, carrot or leafy greens
Protein	Occasionally	Small amounts of plain cooked egg or suitable insects
Treats	Rarely	Avoid sugary, salty and sticky treats
Fresh water	Always available	Check bottles daily for blockages

Avoid citrus fruits, onions, garlic, raw beans, chocolate and sugary or salty human snacks. Dwarf hamsters, especially Campbell's and winter whites, may be prone to diabetes, so sugary foods, including a lot of fruit, are best avoided for them. If you are unsure about a food, check our toxic foods page and ask your vet.

Teeth

A hamster's front teeth grow continuously. Gnawing on safe chews such as untreated wooden blocks, cardboard and hard food helps keep them in check. Signs of overgrown or broken teeth include dropping food, weight loss, drooling and teeth that look too long or misaligned. A vet can trim teeth if needed; do not attempt this at home.

A simple care routine

How often	What to do
Daily	Fresh food and water, a small piece of veg, check your hamster is eating and moving normally, remove spoiled food
Weekly	Spot-clean soiled bedding, check the hoard, weigh your hamster, check teeth, eyes, coat and bottom
Monthly	Partial bedding change, check the wheel and cage for damage, refresh some enrichment
As needed	Vet visits for any concerns; ask about a check-up when you first get your hamster

Weighing weekly on kitchen scales gives you an early warning of health problems, as small animals can lose condition quickly. Our guide to knowing your pet's normal can help you build a picture of what is typical.

Wet tail and other urgent problems

"Wet tail" is a term for serious diarrhoea in hamsters. It is most often associated with young hamsters and stress, such as a recent move, but can affect hamsters of any age. Signs include a wet, dirty or smelly bottom and tail area, diarrhoea, lethargy, a hunched posture and not eating. It can become life-threatening very quickly. If you see these signs, see a vet urgently. Keep the hamster warm, quiet and with access to water while you arrange this.

When to see a vet

Contact a vet urgently if your hamster:

• Has diarrhoea or a wet, dirty bottom.
• Stops eating or drinking, or seems weak or cold.
• Has difficulty breathing, wheezing or clicking sounds.
• Has been injured, has fallen, or has fought with another hamster.
• Has bleeding, or a swelling that appears quickly.

Book an appointment soon for weight loss, lumps, hair loss, overgrown teeth or nails, eye problems, or changes in behaviour. More examples are in our guide to signs your pet needs a vet.

Lifespan and finding the right vet

Hamsters have short lives. Many live for around 2 years, sometimes a little longer, depending on species and health. Because they are small and age quickly, problems can progress fast, so prompt attention matters.

Not all vets see many hamsters, so look for one with experience in small mammals or exotic pets. To keep a simple log of weight, appetite and vet visits, you can create a free Petopedia account.