Heatstroke in Rabbits: Signs and What to Do

Rabbits do not cope with heat well, and heatstroke in a rabbit is a genuine emergency. Temperatures above 25 degrees Celsius are too hot for rabbits and can increase the risk of heatstroke, and rabbits and guinea pigs are more at risk from heatstroke in hot weather than many other pets¹. Once it starts, it can progress very quickly and is often fatal for rabbits¹.

If you think your rabbit has heatstroke, ring a rabbit-savvy vet immediately³. While you get help, move the rabbit to a cool, shaded place, put it on top of a cold, wet towel, create a breeze and gradually dampen its ears with cool water¹. Do not submerge it in cold water: the shock can prove fatal¹.

The signs to act on are weakness and lethargy, panting, warm red ears, salivating, confusion and convulsions¹. Do not wait to see whether your rabbit improves on its own. Heatstroke can develop very suddenly and may lead very quickly to unconsciousness⁵.

Why heatstroke is so dangerous for rabbits

Heatstroke is a serious condition that can progress very quickly, often making it fatal for rabbits¹. Animals can suffer fatal heatstroke within minutes, and obvious signs include collapse, excessive panting or breathing heavily, and dribbling². Heatstroke can kill, it can develop very suddenly, and it may lead very quickly to unconsciousness⁵.

Rabbits are not simply uncomfortable in hot weather; they are among the pets most at risk. Rabbits and guinea pigs are more at risk from both heatstroke and flystrike in hot weather². The threshold is lower than many owners expect: temperatures above 25 degrees Celsius are too hot for rabbits and can increase the risk of heatstroke¹.

Heat exhaustion can lead to heatstroke, so the earlier stages matter too⁶. Heat exhaustion or heatstroke can develop quickly over a few minutes, or gradually over several hours or days⁷. That gradual build-up is the trap for a rabbit in a hutch: a run of warm days with no cool nights lets the animal's condition worsen before anyone notices.

If you keep rabbits outdoors, the practical work of shade, ventilation and frozen water bottles is set out in how to keep an outdoor rabbit hutch cool, and the wider household picture is in keeping dogs, cats and small animals cool in hot weather.

Signs of heatstroke: panting, warm red ears, weakness

The recognised signs of heatstroke in rabbits are weakness and lethargy, panting, warm red ears, salivating, confusion and convulsions¹. Read that list as a progression. A rabbit that is merely quiet and off its food may already be in trouble, and a rabbit that is panting, drooling or fitting is critically ill.

Some of these signs overlap with what owners see in other pets. Early signs of heatstroke across animals include heavy panting, restlessness and lack of coordination⁸. In dogs, the most common heatstroke symptoms are breathing changes, such as panting excessively or changes to breathing effort, and lethargy or drowsiness⁹. A rabbit showing the same pattern, breathing hard and going flat, should be treated as an emergency.

• Panting or rapid breathing: the most visible early sign³
• Warm red ears: the ears are how a rabbit dumps heat, and they flush¹
• Salivating or drooling: a listed sign in rabbits¹
• Weakness and lethargy: the rabbit stops responding normally¹
• Confusion: disorientation that is not normal for your rabbit¹
• Convulsions: a late and very serious sign¹

What to do now: call your vet immediately

Ring a rabbit-savvy vet immediately: heatstroke can be fatal quickly³. Contact a vet if you are worried that an animal is suffering from heatstroke⁵. Do not spend time searching for home remedies first; the call and the cooling happen together.

While you are on the phone, start cooling. The RSPCA's advice for a rabbit, guinea pig or other pet you suspect is suffering heatstroke is to move them to a cool, shaded place, wrap them in a cool, damp towel and phone your vet immediately⁴. The Blue Cross sets out the same steps in more detail: put the rabbit on top of a cold, wet towel, create a breeze, then gradually dampen the ears with cool water¹. Dampen the fur and ears with cool water and seek veterinary attention immediately¹.

The same warning applies to other small pets: never place a guinea pig directly into cold water, as the shock can be fatal¹⁰. Be very careful not to stress an animal out with water if it is not used to it, which includes rabbits, small rodents and most cats¹¹.

If your rabbit is still unwell after resting in a cool place, being cooled and drinking fluids, do not wait: call a rabbit-savvy vet immediately, because heatstroke can be fatal quickly¹². For a rabbit, ring first, cool while you wait, and travel as soon as your vet advises.

Cooling a rabbit safely while you get help

Cooling is not a substitute for the vet; it is what you do on the way. Work through these steps in order and keep the rabbit as calm as you can.

1. Move the rabbit to a cool, shaded place⁴.
2. Put it on top of a cold, wet towel, not under a covering¹.
3. Create a breeze in the room, without blowing it directly at the rabbit¹.
4. Gradually dampen the ears with cool water, then the fur¹.
5. Dampen the ears and feet with cool, not cold, water³.
6. Ring your vet and travel as soon as they advise³.

A few details decide whether this helps or harms. Do not blow a fan directly onto the rabbits, and make sure they have enough room to move away if they wish¹. Keep fan cables out of reach of a rabbit that may chew them¹. A cold, wrung-out towel draped over the run creates evaporative cooling¹. Opening windows or using a fan to increase ventilation is standard advice in hot weather¹³.

Never put a rabbit in cold water

This is the single most important safety rule on the page. Do not encourage your rabbits to swim or submerge them in cold water: the shock can prove to be fatal¹. The same applies to guinea pigs, where placing the animal directly into cold water can be fatal through shock¹⁰.

There is a second mistake owners make: covering the animal. Do not cuddle an overheated pet or cover it with a wet towel, as this will make it hotter¹¹. In dogs, wet towels laid over the body can trap in the heat¹². For a rabbit, the towel goes underneath, the water goes on the ears and fur, and the breeze does the rest¹.

Keeping the hutch cool before it becomes an emergency

Prevention is far easier than cooling a rabbit in distress. Freeze plastic bottles of water and place them in the rabbit's enclosure to help them stay cool, alongside plenty of fresh water; lightly misting rabbits' ears with cold water is also effective if it does not cause them stress⁸. The same official guidance covers pets generally: watch out for early signs of heatstroke, such as heavy panting, restlessness and lack of coordination⁸.

• Frozen water bottles in the enclosure, plus plenty of fresh drinking water⁸
• Shade and ventilation, with a fan that the rabbit can move away from¹
• A cold, wrung-out towel over the run for evaporative cooling¹
• Light misting of the ears with cold water, if it does not stress the rabbit⁸
• Check the rabbit often on any day above 25 degrees Celsius¹

Rabbits are also at higher risk of flystrike in hot weather, so warm days are the time to check the rear end as well as the breathing. The checks are set out in flystrike in rabbits and guinea pigs.

Where to get help

Your first call for a rabbit with heatstroke is a rabbit-savvy vet³. If your own practice is closed, use an out-of-hours service; how the 24-hour rule works is explained in emergency vets: out-of-hours care and the 24-hour rule.

For human heat illness, the NHS advises calling 999 if someone has signs of heatstroke, including still being unwell after 30 minutes of resting in a cool place, being cooled and drinking fluids, hot skin that is not sweating, a fast heartbeat, fast breathing or shortness of breath, confusion and lack of coordination, or a seizure or fit¹². The same signs in a person are a 999 call, not a vet call¹².

If a heatwave is forecast, plan for your animals before the hot days arrive. Including your pets in a household emergency plan covers water, shade and who checks the animals, and keeping dogs, cats and small animals cool in hot weather covers the household as a whole. For the wider picture, see heatwaves and drought: a household guide.