It’s recommended that you perform worming treatment on your puppy every two weeks until they’re 12 weeks old. At this point, you should worm once a month until they’re six months old. After this, you can start worming them just once every three months for the rest of their life. Many flea treatments can be used from 7-8 weeks of age. Many flea treatments should be applied monthly to keep your pooch free from fleas.