Cats that eat cockroaches may have eggs. Because cockroaches carry more bacteria, parasite eggs, and viruses, cats are more likely to develop internal parasites after eating them. If you find that your cat has eaten cockroaches, it is best to do so. Go to the pet hospital for a check-up to avoid internal parasite infection. If you are infected with parasites, you need to do targeted deworming; if you are not infected with parasites, just do deworming once every three months as normal.