Time-critical
Lethargy in hamsters and gerbils
PetPort EditorialLast reviewed
Why is my hamster not moving much?
A small rodent that has gone quiet and still is either unwell or cold. In Syrian and dwarf hamsters, a cold room can trigger torpor — a hibernation-like state where the animal feels cool and stiff and is easily mistaken for dead. Warm it gently and slowly; if it does not rouse, treat it as an emergency.
General guidance for pet parents, not a diagnosis. Every animal is different — confirm anything that concerns you with your veterinarian.
Quick reference
| Torpor trigger | Room temperature dropping, typically below about 18°C |
|---|---|
| Rousing time | 30–60 minutes of gentle warming |
| Never | Use direct heat, hot water or a microwave-heated pad against the animal |
| Ideal room range | About 18–24°C |
| Gerbils | Do not enter torpor — lethargy in a gerbil is illness |
| Urgent signs | Circling, head tilt, dragging a limb, no response to warming |
What is happening
Lethargy in a small rodent has two very different explanations that need opposite responses. Torpor is a temperature-driven dormancy that is reversible with gentle warming. Genuine illness in a 100g animal progresses within hours. Distinguishing them quickly matters, and warming is the safe first step either way.
Signs to watch for
- Cool to the touch, curled and stiff, breathing very slowly or barely visibly
- Awake but hunched, fur standing up, uninterested in food or the wheel
- Wobbling, circling, dragging a limb, or unable to right itself
What you can do
- Warm gently and gradually — cupped hands or a warm room, never direct heat or hot water
- Allow 30–60 minutes for a torpid animal to rouse, then offer water and food
- Keep the cage between roughly 18 and 24°C, away from air-conditioner draughts
See a vet if
The animal does not rouse with gentle warming, is hunched and unwell rather than cold, or shows wobbling, circling or weakness in a limb. These need same-day assessment.
In India specifically
Air conditioning is the specific Indian risk. A cage placed in the path of an AC vent can drop well below the torpor threshold overnight even in summer, and owners understandably do not think of cold as a hot-season problem. North Indian winters create the same risk without AC. Keep the cage away from vents and check the room temperature where the cage actually sits, not the thermostat setting.
Common questions
Is my hamster dead or hibernating?
Look very closely for slow, shallow breathing and check for any whisker movement — torpid hamsters can appear lifeless. Warm gently in cupped hands or a warm room for thirty to sixty minutes. A torpid hamster gradually rouses; one that does not respond in that time needs a vet.
What temperature should a hamster be kept at?
Roughly 18 to 24°C. Below about 18°C torpor becomes a risk, and above the mid-twenties hamsters suffer heat stress. In India that usually means keeping the cage indoors, out of direct sun, and out of the direct path of an air-conditioner vent.
Do gerbils hibernate too?
No. Gerbils are desert animals and do not enter torpor, so a lethargic, unresponsive gerbil is ill rather than cold. That makes lethargy a more straightforwardly urgent sign in gerbils than in hamsters.
My hamster is circling and falling over. What is that?
Circling, a head tilt, or falling to one side suggests a neurological or inner-ear problem, and sometimes a stroke in an older animal. It will not resolve on its own and can be treatable if addressed early. Arrange a same-day veterinary examination.