Why Do Dog’s Pant?
Unlike horses and indeed us humans, dogs do not sweat through the skin; they sweat through the tongue and nose, so that when a dog is panting, he is not necessarily thirsty. He is just sweating.
Naturally if exertion makes a dog pant for long, he loses fluid, which he will have to replace by drinking water. Panting does not necessarily mean thirst, but a thirsty dog will pant.
Excessive panting may indicate distress, and dogs should be taken into a shady or cool place or they may get a heatstroke. It is not unknown for dogs to die at shows in hot weather from heatstroke.
If a stroke is threatened, immediately put cold compresses to the dog’s head or, if the temperature is extremely high, immerse the dog in cold water until the temperature is reduced to about 103°, which is fairly safe for a dog. Of course the animal must be dried off, or chill may result. If the animal has not lost consciousness, cool drinks are invaluable.