The common intestinal parasites are transmitted to puppies either across the uterus before they are born or through the mother's milk after birth. Puppies can be treated for worms ('deworming') as early as two weeks of age but it is more common to treat them when they are three and six weeks of age.
Can you deworm a mother dog?
The majority of veterinarian-approved dewormers, or wormers, are safe to use on a nursing mama dog. Deworming her and her babies is the right thing to do, especially if she hasn't been getting or has missed monthly parasite prevention doses.
At what age do you Deworm newborn puppies?
Because worms are so common in puppies, vets recommend de-worming them for the first time when they're 2 to 3 weeks old. Worms can pass from mother to baby before birth or soon after, through their milk. It will take more than one dose. The first round kills the worms that are there at the time.
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