Puppies can begin heartworm preventative medication from as young as 6/8 weeks old. If your pup is a little older (age 6 months plus) it is important that she is given a heartworm test before preventative medication is given.
How old does a puppy have to be to get heartworm medicine?
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.
Can I give my dog heartworm medicine a week early?
1.) Less than 2 weeks: Give your dog the missed dose immediately. Your dog will be protected from heartworm disease because you will still be within the 45-day grace period in which the preventative is effective.
At what age can puppies begin receiving Heartgard Plus?
HEARTGARD Plus prevents heartworm disease in dogs as young as 6 weeks of age with no minimum weight requirement.
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