Yes - vets actually are not supposed to sell you Heartworm meds without a negative heartworm test each year....although you'll find some that do. Giving heartworm preventative to a heartworm positive dog can be fatal. Also, nothing is 100% effective so there is always a slim chance that a dog can get heartworms, even with being on preventative. Some heartworm preventative companies have guarantees as well - I know Heartguard's policy is that as long as you keep your pet on heartguard every month and have a yearly heartworm test, if your dog gets heartworms they'll pay for the treatment
__________________ ~Magnifique Yorkies~
Purchasing from backyard breeders, pet shops, and puppymills perpetuates the suffering of other dogs.
Educate yourself and buy from reputable breeders or rescue. |