4. French Bulldog Photo by Adobe Stock/Great Brut Here Frenchies don’t do well with hot weather because of their short muzzle, which makes it harder for them to regulate their body temperature. But this flat-faced dog breed can’t tolerate cold weather very well, either. That’s because French Bulldogs have a short, thin coat that doesn’t provide much insulation when the temperature drops. A dog sweater or jacket can provide some protection, but it’s best to avoid prolonged outdoor activities with a Frenchie in extreme weather, whether hot or cold.,5. Greyhound Photo by Adobe Stock/Tatyana Kalmatsuy Capable of blazing fast speeds, the Greyhound has a lean physique with very little body fat and a very thin coat that allows for rapid heat dissipation. While these features make these dogs track stars, they’re less suited for cold weather conditions. Keep outdoor exposure brief when temperatures are below freezing, and don’t be surprised if your Greyhound needs a layer of clothing to stay warm.,When chilly temperatures set in, don’t overlook the importance of keeping your dog safe and comfortable. Even with a furry coat, dogs still need help keeping warm in winter. Of course, some dog breeds are better suited to cold weather, like those with a double coat that provides insulation against the elements. However, other dog breeds can’t tolerate the cold because of their coat type, size, body structure, or other characteristics. Here are the dog breeds that are most vulnerable to cold weather conditions.