The reasons for this situation in cats are as follows:

1. The cat accidentally eats a large piece of food while eating, and it gets stuck in the throat and cannot go down. The cat wants to chew it through the air. Food spit out.

2. The cat licks its body hair, accumulates too much hair in its belly, and wants to spit out the hair balls by itself.

3. Cats’ gastrointestinal discomfort, indigestion, inflammation of teeth or mouth, pain and other problems can also cause cats to chew when there is nothing in their mouths.

4. The cat may have neurological problems, such as epilepsy, which may cause the cat to chew when there is nothing in its mouth.