This heartworm prevention was recommended by our vet for Border Collies. It seems to work as it should!
Interceptor Plus flavored chewable tablets are indicated for the prevention of heartworm disease; and for the treatment and control of adult roundworm, adult hookworm, adult whipworm, and adult tapeworm infections in dogs and puppies two pounds of body weight or greater and six weeks of age and older. Administered once monthly. Made by Elanco US, Inc.