When Do You Worm Newborn Puppies?

Puppies are often born with worms that have been transferred from the mother. However, worming the mother while she is pregnant can help reduce the transfer of worms. Even if the mother has been wormed during pregnancy, puppies can still contract worms from the mother through her milk or excrement. Once puppies have reached 2 weeks of age, they need to be wormed for a number of different parasites, including roundworms, hookworms and tapeworms. Once puppies have reached 12 weeks old, they must be wormed every month until they are 6 months old.