Heartworm Disease: Everything You Need to Know
What Are Heartworms?
Heartworm Disease in Dogs
Heartworm Disease in Cats
Why Heartworm Prevention Is So Important
Annual Testing and Heartworm Preventatives for Dogs and Cats
Prior to administering a heartworm preventative, however, it’s imperative to screen a dog for existing heartworms. Administering a heartworm preventative to a dog that is already a carrier of heartworms can be fatal.