Reasons for a cat's loss of appetite:
1. Stress response: If the cat's usual food is changed, or its living environment or feeding and management methods are suddenly changed, it is easy for the cat to become unaccustomed and subsequently experience stress.
2. Disease factors: such as gastroenteritis, parasitic diseases and a series of infectious diseases. In addition, liver damage should also be considered.
3. Poor palatability of feed: Many cheap cat foods on the market do not have much meat content because they save costs, so they are not fragrant enough. 
4. Cat food gets boring: It's important to ensure your cat's diet is varied. If a cat eats only one type of cat food for a long time, it will eventually get tired of it. You can change your cat's food occasionally, but be careful not to change it too frequently.
5. Indigestion: If a cat has poor gastrointestinal function, it will affect its appetite. Therefore, owners should not overfeed their cats, as a chronically overfed state is very harmful to their digestive system. It is best to feed them at regular times and in measured amounts. You can also give them probiotics daily to help regulate their digestive system and improve their immunity.
6. Bad mood: Cats may also have a poor appetite when they are in a bad mood. For example, if a new pet comes into the house and the owner's attention is focused on the new pet, the cat will be unhappy. Or, if parents are too busy with work and don't have time to play with the cat, the cat will think that you don't like it, and it will also show signs of decreased appetite.
7. Hairballs: Cats have a self-grooming habit and will lick themselves clean. While licking their fur, some hair is swallowed. If this accumulates over time, it can lead to hairballs. The main symptoms include loss of appetite, lethargy, rough fur, and constipation.
