Summer Pet Care: Cooling, Heatstroke First Aid and Flystrike

This page is for hot weather only: how to cool each type of pet, how heatstroke shows up in each, and what to do about flystrike, car trips and summer power cuts. For the year-round temperature limits by species, use the table in seasonal pet care.

Cooling and heat signs by species

Species	Cooling that works	Early heat signs	First-aid note
Rabbit	Shade all day; semi-frozen bottle wrapped in a towel; extra water; groom out dead coat (RSPCA)	Hot red ears, fast shallow breathing, open-mouth breathing, lethargy (PDSA)	Wet the ears with cold tap water first, then slowly soak the body (PDSA)
Guinea pig	Ceramic or stone tile under a box, out of the sun; frozen bottle in a towel or sock; trim long-haired breeds (PDSA)	Short quick breaths, drooling, lethargy, fits, collapse (PDSA)	Fur damped, never wrapped tight; see the towel disagreement below
Chinchilla	Cool, dry, ventilated room; keep °F + humidity % under 150, e.g. 85°F at 65% is already dangerous (MSD)	Heatstroke risk above 65–80°F (18.3–26.7°C) (MSD)	Do not wet; move somewhere cool and dry
Hamster, other rodents	Indoors, curtains shut, window open for a breeze (RSPCA)	Lethargy, fast breathing	Cool, shaded place and call the vet (RSPCA)
Pet birds	Out of direct sun; fresh bathing water; gentle cool misting for parrots (RSPCA)	Panting or holding the wings away from the body means “probably too hot” (Merck)	Shade and misting, not ice
Reptiles	Vivarium out of direct sun; check the temperature gradient more often (RSPCA)	A cool-end reading above the species’ range on your thermometer	Switch off the basking lamp if the cool end can’t be held
Aquarium fish	Tank out of sun; extra water changes to stop overheating (RSPCA); more surface agitation	Fish gasping at the surface; oxygen kills often happen at night or before dawn (UF/IFAS)	Warm water holds less oxygen (UF/IFAS)

Heatstroke first aid, step by step

PDSA’s general sequence, which covers rabbits and small rodents:

1. Move the animal to a cool room or shade.
2. Pour cold tap water slowly over the body, avoiding the nose and mouth. Go slowly: rabbits and small rodents panic in water. For a rabbit, start with the ears (PDSA).
3. Create a breeze with a fan, air conditioning or open windows.
4. Offer cold water to drink; don’t force it.
5. Sit the animal on a cold wet towel, or on an ice pack or frozen vegetables wrapped in a towel.
6. Phone the vet and travel in an air-conditioned car or one with the windows open, ideally with someone cooling the animal on the way.

The towel disagreement. The RSPCA’s rodent advice says to “wrap them in a cool, damp towel”. PDSA says not to cover a pet with a wet towel or cuddle it, because that traps heat. Lying on a cold wet towel satisfies both; wrapping is the part to avoid.

Exceptions. Chinchillas: don’t soak; their dense fur stays wet and mats in warm humid air (MSD). Hedgehogs can go into torpor in very high heat as well as cold, so a limp hedgehog in a heatwave also needs a vet (Merck). Birds: mist, don’t soak.

After a rabbit recovers, watch it for 24–48 hours; heatstroke can damage the kidneys, gut and brain and cause clotting problems (PDSA).

Flystrike: daily checks in warm weather

Blowflies (bluebottles and greenbottles) lay eggs on soiled fur, and the maggots can eat into flesh within 24 hours (RWAF). Check rabbits’ rear ends at least twice a day in summer, and the area just above the tail, where flystrike is surprisingly common (RWAF). Guinea pigs need a daily bottom check too (PDSA). Rabbits most at risk are those with a dirty bottom from diet, dental pain or arthritis that stops them cleaning (RWAF).

If you find maggots it is an emergency, day or night. Pick off visible maggots with tweezers only if that doesn’t delay the trip to the vet (RWAF). Fly-repellent treatments help but don’t replace checks (RWAF).

Travel and summer power cuts

Cars and glass buildings. When it is 72°F (22°C) outside, a car, conservatory, caravan or outbuilding can reach 117°F (47°C) (RSPCA). Never leave a carrier in a parked car. Travel early or late, with shade over the carrier and water available. See travelling with pets.

Power cuts. Without a filter or air pump, a warm tank loses oxygen fast: most fish are distressed at 2–4 mg/L and die below 2 mg/L, and the nitrifying bacteria in the filter also need oxygen to survive (UF/IFAS). In a summer outage:

• Keep the room dark and cool, and cover tanks from direct light.
• Stir the surface or use a battery air pump to add oxygen.
• Stop feeding until power returns; uneaten food uses oxygen as it decays (UF/IFAS).
• Check reptile thermostats and light timers once power returns.

The aquarium setup guide covers water parameters.

Mistakes that turn a hot day into an emergency

• Ice directly on skin. Guinea pigs can get ice burns from bare frozen bottles; wrap them (PDSA).
• Plastic hides in the sun. They trap heat; use wood, cardboard or hay tunnels (PDSA).
• Fans blowing straight on a pet with no escape. Move air in the room and give the animal a choice of spot.
• Wetting a chinchilla. Use cool, dry air instead (MSD).
• Missing one bottom check. Hours, not days, separate egg-laying from tissue damage (RWAF).