Treatment methods for cat parvovirus:

1. When a cat is infected with parvovirus, the cat should be isolated immediately to prevent contact with other animals.

2. Then the cat needs to be treated with hyperimmune serum and monoclonal antibodies.

3. Cats need to stop eating and drinking while they are sick. If the cat is dehydrated, rehydration treatment is required.

4. Cats can also be injected with antibacterial drugs to prevent further infections.

The reasons why cats get parvovirus:

1. It may be that the cat was not vaccinated at the beginning, and the living environment contained parvovirus, so it became infected.

2. It is also possible that the cat has been injected with parvovirus, but before the vaccine has produced sufficient immunity, it will be infected by parvovirus.

3. It is also possible that healthy cats can become infected if they come into contact with the feces of sick cats or items contaminated by the feces of sick cats.