Your Hamster Vet-Prep Sheet
Hayfold a warm home for small-pet folk · hayfold.com Hamster — Vet-Prep Sheet
🔍 Find an exotic-mammal vet — before you need one
- Search the AEMV find-a-vet directory (the Association of Exotic Mammal Veterinarians), or, in the UK, the RCVS Find-a-Vet tool — or search “exotic / small-mammal vet near me”.
- Call ahead and ask the key question: “Do you see small / exotic mammals?” Not every vet does. Ask the exam fee while you’re on the phone, so the cost is one less panic in a crisis.
- Find and save one now, while things are calm — not in the middle of an emergency.
📇 Fill this in now — before the crisis
Two minutes now saves ten in a panic. Print it and keep it with your care notes.
🚨 Is this an emergency now?
See a vet promptly if you notice any of these:
- A wet, soiled or matted rear end with diarrhoea, low energy and loss of appetite — “wet tail” (often proliferative ileitis) progresses fast and is frequently fatal; see a vet urgently
- Not eating, weight loss, or a hunched, low-energy hamster
- Rapid or laboured breathing, or a bluish tint to skin or gums (possible heart failure in Syrians)
- Any lump or swelling, or overgrown front teeth
- A hamster that is cold and stiff (torpor) — warm it gently and seek advice
- Sudden diet-related diarrhoea, or diarrhoea after any medication (some antibiotics are fatal to hamsters)
When in doubt, a vet call is never wrong — most issues are reversible if caught early.
🚗 On the way / while you wait
✅ Do
- Keep it warm — small mammals chill and dehydrate fast, and cold makes almost everything worse.
- Bring it in its own bedding/carrier with some familiar food.
- For rabbits and guinea pigs, keep offering their normal hay, greens and water — a gut that stops is an emergency.
- Bring a fresh dropping or urine sample if you can.
- Keep it calm and quiet.
⛔ Don’t
- Don’t give any human or OTC medicines — some common antibiotics are fatal to rabbits and guinea pigs.
- Don’t withhold food from a rabbit or guinea pig.
- Don’t let it get cold.
- Don’t handle it more than necessary.
🎒 What to bring
- A fresh dropping or urine sample, if you can collect one.
- Photos and a short video of the behaviour or symptom — it may not show it in the clinic.
- A note of your setup and exactly what — and how often — you feed.
- A note of eating, drinking and toileting over the last day.
- The animal in a secure, warm carrier.
🗣️ What to tell the vet
A general vet may not know this species. Come ready to explain its correct care:
- Enclosure
- Far bigger than the cages sold for them, with a solid floor (never wire mesh — it injures feet) and, above all, a deep layer of bedding so they can dig the burrows they’re built for. A secure plastic or glass tank, or a barred cage with narrow spacing and a raised lid, works — never a wooden cage, and never anything a determined escape artist can squeeze out of. Add a dark nesting box (ideally floorless so you can check them), an area of deep substrate or coarse sand to burrow, and multiple hides. Keep it away from things that make ultrasound (TVs, screens, running water), which hamsters find stressful.
- Companionship
- Most hamsters are solitary and happiest alone. Syrian and Chinese hamsters must always live on their own. Some dwarf species (Roborovski, Winter White, Campbell’s) can sometimes live in same-sex pairs or trios if littermates are grouped young and stay harmonious — but they don’t need company to be happy, and pairs often fall out later, so you must be ready to house them separately. Fighting is serious (hamsters don’t play-fight); separate permanently and don’t reintroduce. Don’t even house males close to each other, and never mix species or sexes.
- Temperature
- Keep hamsters indoors, warm and out of draughts and damp — outdoor cold is dangerous. If they get too cold they can slip into a hibernation-like state called torpor, which is risky because domestic hamsters don’t carry the fat reserves to survive long without food. If a hamster does go stiff and cold, warm it gently and offer food and water, and call a vet if unsure.
- Substrate
- A deep, generous layer of safe bedding over a solid floor — deep enough to dig and tunnel in, topped with nesting material such as plain paper. Coarse sand is a good natural burrowing/bathing substrate. Never use cotton-wool or fluffy strand “fibre” bedding: it can be swallowed or wrap around limbs and cost a hamster its foot. Spot-clean every few days and do a fuller clean only about once or twice a month, saving a little unsoiled bedding for familiar scent — over-cleaning stresses them.
- Enrichment
- Hamsters are nocturnal and astonishingly active — a wild hamster can run several miles a night — so give plenty of space plus a good solid wheel: large-diameter (a rat-sized wheel), axle-free and with a non-slip surface, but not the only enrichment. Add deep substrate to burrow, tunnels, sand to dig, and safe things to gnaw (their teeth grow continuously). Scatter-feeding suits their natural hoarding and foraging.
- Diet
- A good-quality, varied hamster diet — a complete compound pellet or a proper hamster seed/grain mix — reflecting their natural mix of seeds, cereals and some insect protein. Hamsters cheek-pouch and hoard food, sitting up to gnaw it, so expect a food stash in the nest. Provide constant fresh water, ideally from a small-diameter or valveless sipper bottle (hamsters can’t suck hard against a stiff ball-valve), checked daily. Avoid sudden diet changes and stale food, which upset their gut.
- Supplements
- None needed on a good-quality, varied hamster diet. Avoid loading them with sugary or fatty treats — dwarf hamsters in particular are prone to weight and blood-sugar problems.
⚕️ Small mammals are prey animals and hide illness until it is advanced, so any change in eating, droppings, drinking or behaviour is urgent — in rabbits and guinea pigs, not eating or passing no droppings for 12–24 hours can be a life-threatening emergency (gut stasis). They also chill and dehydrate quickly, so keep it warm. Tell the vet about your diet and any remedies you’ve used, and ask for exotic-mammal-safe medicines and doses — several antibiotics that are routine in other pets are dangerous to rabbits and guinea pigs.
⚕️ "Wet tail" (proliferative ileitis) — a wet, dirty rear end with diarrhoea — is a rapidly fatal emergency in hamsters and needs a vet the same day, not a clean-up.
Then note which of the warning signs (above) you are seeing, when they started, and whether they are getting worse.
❓ Questions to ask
- Do you routinely see small / exotic mammals? If not, can you refer me to a vet who does?
- What are the likely causes — and could my setup or diet be contributing?
- What is the treatment plan, the likely cost, and what should I watch for at home?
- How do I prevent this from happening again?