Puppies
Initiate treatment at 2 weeks; repeat at 4, 6, and 8 weeks of age. For a puppy at increased risk, also treat at 10 and 12 weeks, and then monthly until the puppy is 6 months old. Thereafter, use a heartworm preventive medication that is also effective against hookworms and roundworms.
Nursing Dams
Treat concurrently with pups.
Adult Dogs
Treat regularly for prevention. Also monitor and eliminate parasites in pet's environment.
Newly Acquired Animals
Worm immediately, after 2 weeks, and then follow above recommendations.