Should my dog be on heartworm prevention year round?

It is the recommendation of the American Heartworm Society to keep dogs on a heartworm prevention year round. Not only does it protect against heartworm disease, but also works as a preventative for some intestinal parasites. For more information please visit: American Heartworm Society Canine Guidelines https://www.heartwormsociety.org/images/pdf/Canine-Guidelines-Summary.pdf