When cats have diarrhea, they generally need to fast when using montmorillonite powder, which can temporarily relieve diarrhea, and then the medicine can be administered according to the specific situation of the cat. Cat diarrhea is usually caused by improper diet or catching cold. Try to feed the cat some light and nutritious food, take measures to keep warm, and feed the cat some probiotics to help regulate its gastrointestinal condition.