Does my puppy need heartworm medicine? Puppies and kittens should be taking heartworm prevention medication monthly as young as 6-8 weeks old. They are just as prone to getting infected as older dogs and cats, so the prevention must start as soon as possible.
What month do you start heartworm pills? We recommend starting your pet on heartworm medication June 1st and continuing until November 1st. In some areas such as the Southern USA, heartworm prevention is necessary year-round.
Can a 5 month 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.
What time of year do dogs get heartworm? Yes, dogs can get heartworms in the winter. As heartworm larvae spread through mosquito bites, some people believe dogs can’t get heartworm in the winter, as mosquitoes are inactive. However, according to the Food and Drug Administration (FDA), it’s essential you deworm your dog year-round.