Because it usually takes 6-7 months for an infected dog to test positive, heartworm wouldn’t show up in tests on puppies younger than six months of age. Vaccines Vaccinations often depend on a variety ...

Dr. Phil Zeltzman is a mobile, board-certified surgeon in Allentown, PA. Find him online at www.DrPhilZeltzman.com.He is the co-author of “Walk a Hound, Lose a Pound” (www.WalkaHound.com).Kelly Serfas ...