Cats eating cockroaches generally don't pose a problem, but there are some potential risks that need to be considered.
First, cockroaches themselves are not poisonous, but they may carry pathogens such as Salmonella, which can cause diarrhea in cats.<sup>1</sup> Furthermore, if cockroaches breed in unsanitary environments, they may carry even more pathogens, increasing the risk of infection for the cat.

Cats have a higher body temperature, which helps suppress certain pathogens, so they are usually not a problem. However, to be on the safe side, it is recommended to maintain good hygiene in your home to prevent cockroach infestations and avoid using insecticides that are harmful to pets.
If your cat accidentally ingests a cockroach, it's best to observe it first, especially if it develops symptoms like diarrhea. If it does, take appropriate action promptly. If your cat accidentally eats a cockroach, observe it first. Don't worry too much if you don't notice it immediately, as the cat may not experience serious problems.