Dogs don't sweat like humans do. They rely on panting to cool themselves down to regulate their body temperature
After physical exertion or intense exercise, dogs pant heavily to recover and regulate their breathing and heart rate.
Excessive panting in dogs may indicate medical condition such as injury, infection, respiratory problem, or heart disease.
Some medications can cause panting as a side effect. If your dog is on a new medication, check for panting regulation.
Overweight dogs pant more due to strain on their respiratory system. Need for weight loss to improve their health.
Female dogs in heat or pregnant dogs may pant more than usual due to hormonal fluctuations.