The reasons why cats open their mouths to pant:
1. When the temperature is too high, it is difficult for cats to dissipate heat, which will lead to shortness of breath and accelerate their own heat dissipation.
2. When a cat is too excited when playing, it will also open its mouth and pant. It will return to normal when it calms down.
3. When a cat suffers from heart disease and will keep panting with its mouth open, it needs to be taken to the pet hospital for treatment in time.
4. If the cat is frightened, it will pant heavily because of fear and nervousness. It is necessary to calm the cat's mood in time.
5. If the cat has seasonal allergies or dust irritation, causing asthma, it will open its mouth and gasp, and it needs to be sent to the doctor immediately for treatment.