How long after a puppy’s second deworming can it be bathed?

For topical deworming, no matter if it is the puppy’s first or later session, wait a week after each before bathing. The drug takes a long time to absorb and spread, generally about 3 days to reach the whole body via sebaceous glands.

To protect the effect, bathe the dog about a week after topical deworming. Bathing soon after causes drug loss and failed parasite control.