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Dog breeds prone to heat stroke, and how to keep your dog safe

Why dogs struggle in hot weather, which dogs are most at risk of heat stroke, practical ways to keep your dog cool, the warning signs of heat stroke and what to do straight away if you see them.

By Mypetzilla Editorial TeamPublished Updated 3 min read
Photo for the article: Dog Breeds Prone to Heat Stroke

The short answer

Any dog can get heat stroke, but flat-faced (brachycephalic) breeds such as Bulldogs and Pugs, and dogs with long or thick coats, are at higher risk. Dogs only sweat a little, through their paw pads, so they rely mainly on panting to cool down. Keep your dog out of the heat in the hottest part of the day, give shade and water, and never leave them in a car. If your dog shows signs of heat stroke, start cooling them and contact a vet immediately.

Key considerations

  1. 01Flat-faced breeds and dogs with long or thick coats are at higher risk of heat stroke.
  2. 02Dogs cool down mainly by panting, which works less well in hot, humid weather.
  3. 03Avoid walks and hard exercise in the hottest part of the day, usually from late morning to mid-afternoon.
  4. 04Never leave a dog alone in a car, even for a short time or in the shade.
  5. 05Heat stroke is an emergency. Start cooling your dog and contact a vet immediately.
In this guide

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For many dog owners, warm weather means long days and plenty of time outside. Hot weather also brings risks, and some dogs are far more vulnerable than others. Walks, hikes and games of fetch can all lead to overheating if you don't take care.

Which dogs are most at risk?

Any dog can overheat, but some are at higher risk:

  • Flat-faced (brachycephalic) breeds, such as the Bulldog and Pug. Their short noses make it harder for them to breathe and cool down.
  • Dogs with long or thick coats, which hold in heat.
  • Dogs that are overweight, very young, elderly, or have heart or breathing problems.

If your dog is in one of these groups, take extra care whenever the weather is warm.

Why do dogs overheat?

Heat stroke happens when a dog's body can no longer keep its temperature under control. It can develop quickly in hot conditions, especially with exercise.

Dogs only sweat a little, through their paw pads, so they rely mainly on panting to cool down. Panting is less effective than sweating, particularly in hot or humid weather, and a dog's fur can make them warm up faster.

How to keep your dog cool

  • Give plenty of fresh, cool water. Refill the bowl several times a day and make sure your dog can always reach it.
  • Provide shade. If you are outside together, put their bed, toys and water in a shaded spot so they are encouraged to rest there.
  • Avoid the hottest part of the day. This is usually from late morning to mid-afternoon. Walk your dog early in the morning or later in the evening instead, and keep exercise gentle.
  • Offer a paddling pool. Many dogs enjoy a shallow pool to lie or splash in. Stay with them while they use it.
  • Take care with car journeys. Only make car journeys in hot weather if you need to, keep the car cool and take water.

Never leave your dog in a car

Never leave your dog alone in a car, even for a short time and even in the shade. The inside of a car can become much hotter than outside, very quickly, and this can be fatal.

Signs of heat stroke

Watch for:

  • heavy panting or difficulty breathing
  • drooling
  • tiredness, weakness or reluctance to move
  • seeming confused or unsteady on their feet
  • vomiting or diarrhoea
  • collapse or seizures

What to do if you think your dog has heat stroke

Heat stroke is an emergency. Contact a vet immediately, and start cooling your dog while you do:

  1. Move your dog somewhere cool and shaded, out of the sun.
  2. Wet or soak them all over with tap water, or put them in a bath or paddling pool of tap water. Don't let them breathe in water.
  3. Let them have small amounts of cool water to drink if they want it.
  4. Keep air moving around them, for example with a fan or an open car window on the way to the vet.

Keep cooling your dog on the way to the vet. Even if your dog seems to recover, they still need to be checked by a vet as soon as possible.

Before you decide

  • Is your dog a flat-faced breed, overweight, elderly or long-coated?
  • Can you walk your dog early in the morning or later in the evening?
  • Does your dog have shade and fresh water whenever they are outside?
  • Do you know the number of your nearest vet, including out of hours?

Questions readers ask

Which dog breeds are most likely to get heat stroke?

Flat-faced breeds, such as Bulldogs and Pugs, are at higher risk, along with dogs that have long or thick coats. Overweight, elderly and very young dogs are also more vulnerable.

Sources: Position statement: heat-related illness in dogs

Do dogs sweat?

Only a little, through their paw pads. Dogs rely mainly on panting to cool down, which is why they overheat more easily than people.

What should I do if my dog has heat stroke?

Move them somewhere cool, soak them with tap water while keeping air moving over them, and contact a vet immediately. Keep cooling them on the way to the vet.

Sources: Position statement: heat-related illness in dogs

Sources and further reading

  1. Position statement: heat-related illness in dogs, UK Brachycephalic Working Group (). Accessed
  2. Travelling with your dog in the summer, Blue Cross. Accessed

About this article

  • Written by Mypetzilla Editorial Team
  • Published
  • Updated

This article is general pet advice, not veterinary or legal advice. If your pet is unwell, speak to a vet.