After you play fetch or long walk with your pet, you wonder why your dog open mouth breathing and panting? It could be a temporary symptom of heat stroke. If the weather is too warm or after some exercises, dog body temperature will rise. Dogs cannot sweat through their skin but paw pads only, one way of cooling down their bodies and regulate their bodies temperature are panting.
Sometimes even they didn’t go for exercise, if the weather become warmer, dogs will still panting in order to regulate their temperature