Winter Pet Care: Bringing Pets Indoors, Torpor and Power Cuts

This page is for cold weather only: when outdoor rabbits and guinea pigs should come inside, how to keep a hedgehog out of torpor, what to do when the power fails, and how central heating affects birds and other pets. For year-round temperature limits by species, see seasonal pet care, which also lists the basic hutch-winterising steps.

Cold-weather triggers and what to do

Pet	Trigger	Action
Outdoor rabbit	Temperatures approaching freezing (RSPCA)	Move the hutch indoors or into a shed, outhouse or unused garage; never a garage in use, because of exhaust fumes (RSPCA)
Old, thin or young rabbit	No thick winter coat yet (RSPCA)	Consider bringing indoors for the whole winter (RSPCA)
Outdoor guinea pig	Below 59°F (15°C) (RSPCA)	Move indoors, away from radiators and draughts (RSPCA)
African pygmy hedgehog	Enclosure below 68°F (20°C) risks torpor (Merck)	Keep 75–85°F (24–29°C) with a heat pad under the enclosure or a ceramic heater on a thermostat (Merck)
Pet bird	Below 50°F (10°C); fluffed up, beak tucked into the chest, lethargic (RSPCA)	Extra warmth; cage cover; away from radiators and draughts (RSPCA)
Tropical fish	Water falling below the normal 75–82°F (24–28°C) range (RSPCA)	Check the heater and hold a steady temperature (RSPCA). In a power cut, warm the water once it reaches the mid-50s°F, about 13°C (NC State)
Pond fish	Water near 39°F (4°C) (RSPCA)	Floating pond heater or de-icer to keep a hole open for gas exchange (RSPCA)

Bringing rabbits and guinea pigs indoors

The RSPCA’s method for rabbits:

1. Start early. Bring them in for longer periods each day through summer and autumn, before the move is permanent.
2. Avoid short in-and-out trips once it’s cold. Outdoor rabbits can struggle with the temperature jump.
3. Adjust the light. Lengthen evening lamp time gradually, put the enclosure near a window for daylight, and give them a dark area to sleep.
4. Heated or not. In an unheated room keep the hutch insulation on the top and sides; in a heated one keep them away from direct heat and wires.
5. Moving back out. Wait until days reach at least 50°F (10°C), increase outdoor time gradually, and keep them in on cold nights.

Guinea pigs follow the same rule: they cope badly with large temperature swings, so wait for settled weather before moving them back out (RSPCA). Bed them on dust-free hay throughout, not pine or fluffy strand-type nesting (RSPCA). For indoor setups, see small pet housing essentials.

Hedgehog torpor

Pet African pygmy hedgehogs don’t hibernate safely. Below 68°F (20°C) they can drop into torpor, an attempted hibernation with a greatly reduced response to touch, slow heart and breathing, and possibly lower resistance to infection (Merck). A cold, unresponsive hedgehog should be treated as torpid. Merck reports a good prognosis once the animal is in a quiet, warm environment and given fluids by a vet, so warm it gradually and get it seen. Overnight thermostat setbacks and power cuts are the usual triggers. See the hedgehog page.

Power-cut plan for vivaria and tanks

Reptiles. Glass tanks are poor insulators and lose heat fast (Merck). In an outage:

• Wrap the vivarium in blankets, leaving some ventilation.
• Use a hot-water bottle or microwavable heat pad wrapped in a towel, outside one end of the enclosure. The RSPCA warns that reptiles can burn on heat sources placed inside and may not move away.
• Check temperatures often so you don’t overheat a small enclosure.

Fish (NC State):

• Stop feeding.
• Insulate the tank with a blanket, sleeping bag or newspapers.
• Most tropical fish tolerate the low 60s°F (about 16–17°C), and even the high 50s°F (about 14–15°C), for several hours. Act once the water reaches the mid-50s°F (about 13°C).
• If ammonia rises above 1 ppm, change 10–30% of the water with dechlorinated, temperature-matched water.

NC State lists propane or kerosene heaters among its options. Indoors these produce combustion fumes, so don’t use one in a closed room with birds or other pets. The aquarium guide covers the nitrogen cycle the outage interrupts.

Birds, drafts and dry air

Central heating dries the air, and pets can become dehydrated even though they drink less in winter (RSPCA). Birds are most affected: the RSPCA recommends a humidifier against dry skin and dull feathers, fresh bathing water, and a cage away from radiators and draughts. Birds also eat slightly more to keep warm. Aviary, coop and run birds need extra dry bedding such as straw, enclosures covered against wind and rain, and water checked so it doesn’t freeze over (RSPCA). Keep cages out of the kitchen, because fumes from overheated non-stick pans cause respiratory problems (RSPCA).

Humidity isn’t good for every species. Hedgehogs prefer under 40% (Merck), and chinchillas become ill in humid conditions (RSPCA), so humidify the bird’s room, not the whole house.

Winter mistakes with real consequences

• Short trips indoors for outdoor rabbits. Repeated temperature jumps stress them (RSPCA).
• Heater thermostat set back at night. A hedgehog can slip into torpor below 68°F (20°C) (Merck).
• Heat pad inside a reptile carrier or vivarium during an outage. Risk of thermal burns (RSPCA).
• Breaking pond ice or pouring boiling water on it. Both can harm or kill the fish; use a pan of hot water instead. Never use antifreeze or salt (RSPCA).
• Frozen water bottle unnoticed. Check outdoor water at least twice a day and keep a spare indoors (RSPCA).