Keeping a French Bulldog safe in summer

Every summer, British vets see French Bulldogs die of heat stroke. The circumstances are rarely negligent — they are ordinary. A normal walk, on a day that felt pleasant.

The rule

Above roughly 20°C, a French Bulldog does not get a walk.

Not a shorter walk. Not a slower one. The garden, a cooling mat, a chew, and a walk at six in the morning instead. UK research into canine heat-related illness consistently finds exertional heat stroke — triggered by exercise — to be the dominant cause, far ahead of vehicle confinement.

Why this breed specifically

Dogs shed heat almost entirely by panting. A French Bulldog's airway is obstructed at several points, which means the cooling mechanism it depends on is the exact mechanism that does not work properly. It is trying to run its air conditioning through a blocked pipe.

Excess weight compounds it, as does any degree of untreated BOAS.

Excitement counts

A dog does not need to exercise to overheat. Visitors arriving, an extended indoor play session, a stressful car journey — all produce sustained hard panting, and in a compromised airway that is sufficient. Watch the dog on hot days when nothing much is happening.

The warning signs, in order

1. Frantic, noisy panting that does not settle when the dog rests
2. Thick, ropey drool
3. Bright red gums and tongue
4. Unsteadiness or reluctance to stand
5. Vomiting or diarrhoea
6. Gums turning pale or blue
7. Collapse or seizure

By stage four this is an emergency. Do not wait to see whether it improves.

The first five minutes

Cool first, transport second, and cool while you transport.

1. Get the dog out of the heat and into shade or indoors
2. Pour cool water over it continuously — over the whole body, not just the paws
3. Get air moving over the wet coat: a fan, an open car window, anything
4. Offer small amounts of water to drink but do not force it
5. Phone the practice while you are doing this so they are ready
6. Keep cooling in the car on the way

The older advice about avoiding cold water for fear of shock has been largely revised. Current veterinary guidance supports rapid, aggressive cooling — delay is the greater danger. If you have a thermometer, above roughly 40°C confirms it, but do not spend time looking for one.

Prevention that actually works

• Walk before 7am and after 8pm in summer
• Check pavement temperature with the back of your hand — it runs far above air temperature in sun
• Keep the dog lean; fat is insulation
• Treat diagnosed BOAS surgically, which directly reduces heat stroke risk
• Cooling mats and shade for passive management on warm days
• Never leave the dog in a conservatory, a car, or a room that gets afternoon sun