1. There are parasites in the body: The dog does not eat and its hair becomes rough. At this time, there may be parasites in the dog's body. At this time, deworming measures should be taken.

2. Poor gastrointestinal problems: If your dog has a weak constitution and poor gastrointestinal digestion, it may cause gastrointestinal problems. You can buy some dog food containing probiotics for your dog to eat to promote digestion and gastrointestinal motility. .

3. Picky eaters: Dogs who don’t eat may be picky eaters. Dogs who are picky eaters for a long time and have unbalanced nutrition are not good for their health. The owner should feed less snacks and feed them regularly.

4. Diseases: Anorexia may also occur in the early stages of infectious diseases such as canine fever, parvovirus enteritis, coronavirus, rotavirus, and salmonellosis. At this time, the dog should be taken to the hospital in time. , confirm the symptoms and prescribe the right medicine.