Some dogs struggle with heat more than others.

Heatstroke in dogs is not just a summer scare—it’s a real danger woven into their biology, breed traits, and environment. While any dog can overheat, certain breeds are repeatedly flagged in veterinary studies for being more vulnerable, especially in hot or humid conditions. Genetics, body shape, breathing anatomy, coat thickness, and weight all play parts. In the sections below, I walk you through 13 breeds that tend to show up in heat-illness case reports and risk analyses, along with why they’re more at risk and what owners can do to watch for danger.



