Safe for Puppies, Too HEARTGARD Plus prevents heartworm disease in dogs as young as 6 weeks of age with no minimum weight requirement.
When should I start giving my puppy heartworm medication?
The American Heartworm Society recommends that puppies and kittens be started on a heartworm preventive as early as the product label allows, and no later than 8 weeks of age.
Can a 8 week old puppy have heartworms?
A 10 week old puppy is too young to have a heartworm infection. Your puppy could have heartworm larvae circulating in his blood but the adult heart worms take 4-6 months to develop in the heart.
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