Cats can generally start deworming when they are 2 months old. Whether inside or outside the body, they need to be dewormed once a month, especially in spring and summer, when mosquitoes are more active. In autumn and winter, it can be changed to Drive once every 2-3 months. When deworming, you can also choose drugs that are both internal and external dewormers, which are more convenient and can simultaneously prevent tapeworms, roundworms, hookworms, etc. in the body, and can also repel fleas, mites, ticks, etc. outside the body. However, targeted internal and external anthelmintics will of course be more effective, and you can choose them according to your preferences.