You can ask the original owner what to eat.

You can choose some digestible canned food for it. . . My cat often eats healthy canned soup and raw food. Good quality.

In addition, there are many people who know cats in Baidu Cat Bar. If you really can't, just ask there.

If you have diarrhea for three or five days and feel depressed, you should take it to the hospital. After all, it's a kitten and can't stand the toss.