Summers can prove to be fatal for your teeny-tiny mates. Hence, looking for the signs of overheating in dogs is very crucial to avoid any mishap (God forbid). If you see your dog panting heavily, this can be a sign that he is thawing. Other signs include, excessive drooling, increased breathing and drenched eyes. In the worst cases, the dog can also get seizures which are really serious and you don't have any option besides taking him to the vet.