Internal deworming of cats can be done once every three months, while external deworming is usually recommended once a month, mainly targeting fleas, mites, lice, ticks and other parasites.

But if the cat rarely goes outdoors, external deworming can also be relaxed to once every three months. When deworming internally and externally, it is best to do it under the guidance of a veterinarian to ensure the health of the cat.