Cats who can't poop belong to constipation, which can be caused by many reasons, such as too dry food, too little water, intestinal infarction and so on.

Then, after the owner discovers that the cat is constipated, he needs to fast the cat first, and then he can try to feed a proper amount of honey water to lubricate the intestines and promote defecation. If it still doesn't work, you can feed a small amount of magnesium sulfate for diarrhea, or use warm water enema.