If the cat doesn't vomit or diarrhea, it just has a bad appetite. You can buy a canned meat for the cat and see if it can be eaten. If you want to eat, you can be picky about food. It's no big problem! If you don't eat it, it may be the mental and appetite loss caused by gastrointestinal dysfunction or oral problems. It's best to check your mouth first, or you can feed it for a few days to recuperate. Can promote appetite and regulate gastrointestinal function! Try to keep the cat in the shade and avoid activities in the hot sun.