severe heatstroke

Does Heat Make Dogs Sick? Overheated dogs can suffer heat exhaustion, heat stroke or sudden death from cardiac arrhythmias. Panting, followed by disorientation and fast, noisy breathing could signal overheating. Other possible signs: Collapsing or convulsing, bright red or blue gums, vomiting and diarrhea. Does the heat make dogs vomit? Watch your pooch for signs