1. See if the cat is healthy. You can refer to the following methods: first, look at the cat's appearance, whether the hair is smooth and supple, and if there is no obvious skin disease, the cat will be healthier.
2. Second, observe the behavior of cats, whether there is itching or abnormal appetite and spirit, and cats without abnormalities are also healthier.
3. Third, see if the cat's defecation is abnormal. A cat without abnormality is a healthy cat.