You can judge whether there is defecation by touching the cat's belly. If the cat's belly is hard, there may be defecation. If the cat's belly is very soft, there is basically no defecation. If your cat cannot pass stool, it may be caused by constipation. You can feed your cat some probiotics to promote gastrointestinal motility. Usually, the cat should drink more water and feed it some food that is easier to digest.