Anorexia, weight loss, and poor mental health in cats may be caused by a variety of reasons. Common causes include diseases such as colds, feline distemper, feline nasal congestion, pancreatitis, feline transmission, etc.

Having hair balls in a cat's belly can also cause loss of appetite and poor spirits, and may also cause symptoms such as vomiting and constipation. In addition, indigestion, environmental changes, oral diseases, psychological stress, etc. may also affect the cat's appetite.

For these symptoms, first observe the cat’s overall health, including mental state, behavioral changes, eating habits, etc. Maintaining a stable living environment for cats and reducing stress sources can help improve their mental state and appetite.