Heat Sensitivity & Hyperthermia in Bernese Mountain Dogs

Heatstroke is a continuum, and the useful skill is recognising the second rung rather than the fourth. Once a dog is staggering, organ damage has often already begun.

Move the dog out of the sun first, into shade or air conditioning. A 100 pound Bernese cannot be carried by most people, so plan for this in advance and know where the nearest shade and water on your usual routes are.

Apply cool, not ice-cold, water to the areas where blood runs close to the surface: the belly, the groin, the inner thighs, the armpits and the paws. Ice water and ice packs are counterproductive because extreme cold constricts surface blood vessels and slows heat transfer out of the body. Running tepid water from a hose over the underside, with air moving across it, is the most effective home method.

Getting water down to the skin matters enormously in this breed. A dense double coat will hold water on the surface and do nothing at all. Work it in with your hands rather than pouring it over the back.

Offer small amounts of cool water to drink but never force it, and never pour water into the mouth of a dog who is not fully alert. Then call the veterinary practice or the emergency clinic and drive. Cool on the way with the air conditioning on the dog rather than the driver.

Do not wait to see whether he improves. A dog whose temperature has already gone high can suffer clotting problems, kidney injury and gut damage that only show up over the following day or two, and those complications are treatable if they are anticipated.

If you think your Bernese has heat sensitivity & hyperthermia, the plan is three steps: write down what you have seen and when it started, book a veterinary appointment rather than waiting for the next flare, and take video of the behaviour or symptom before you go — the thing you are worried about rarely happens in the consulting room. Screening in the parents covers hip dysplasia, elbow dysplasia, bloat (gdv).

What the vet visit should produce is a diagnosis and a written plan, not just reassurance: what is being ruled out, what the monitoring interval is, and which signs mean you come back sooner. Ask what the treatment costs across a year rather than per visit, because that is the number that decides whether you are managing this condition or reacting to it.

Between appointments, keep a short log — dates, what you saw, what changed. It is the single most useful thing an owner brings to a follow-up, and for heat sensitivity & hyperthermia it is often what separates a clear pattern from a guess.