Was a Heartworm test done before given the Heartgaurd?
Was he on Heartworm preventive before this started?
Does he have any other health issues?
Ivermectin is what is in Heartgaurd it does not kill the adult heartworms.
It also depends on what class he is in, meaning how severe the heartworms are.
Your dog may also need get injections of immiticide. That can be gotten from a a veterinarian
http://www.petplace.com/drug-library/melarsomine-immiticide/page1.aspx
http://www.marvistavet.com/html/body_heartworm_treatment.html
Heartworm treatment is a long process and can get expensive.
Also did the Vet do any tests to determine that he was Heartworm Postive?
Edited by Selena H. on October 25 2006 at 3:10 PM
I will give you the best advice that I can give, for you pets well being.
If you are satisfied with my answer please click the
ACCEPT so I receive payment. If you need further help please let me know.
BONUSES are greatly APPRECIATED