Can Being In Heat Make My Dog Sick?

Can Being In Heat Make My Dog 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. Do dogs get upset stomachs when in heat?