If the cat is dewormed on time, then the cat does not need to be dewormed immediately after eating a cockroach; if the cat is not dewormed, then the cat must be dewormed immediately after eating a cockroach. Normally, cats will not have any big problems if they eat cockroaches, but you should pay more attention to it. If your cat has a habit of eating cockroaches, do not use pesticides, otherwise the cat will be easily poisoned after eating them.