If the cat vomits yellow water several times a day, the owner needs to fast the cat for a day. If the cat is in good condition, it may have eaten food by mistake. The owner does not need to worry about letting the cat drink more water and wait for it to be metabolized; If the cat vomits yellow water several times a day and is accompanied by lack of energy and inactivity, the owner should carefully observe whether it is caused by disease.