Dieselsmom
Boxer Booster
Actually if your dog has heartworms and has been on heartgard, they guarantee their product. If your dog does get heartworms while on their product, they will pay for treatment. You may want to look into this.
If im not mistaken, heartgard can also be used to treat heartworm, but to be safe contact your vet for the correct treatment, if she has already tested positive, I would not give another dose of treatment until speaking to your vet.
If im not mistaken, heartgard can also be used to treat heartworm, but to be safe contact your vet for the correct treatment, if she has already tested positive, I would not give another dose of treatment until speaking to your vet.