Half of these dogs are heartworm positive which means first we need to clear up other medical issues, gain some weight, and then treat them for heartworm before they would be available. (shelterme.tv)
This sweet girl was heartworm positive when she came into rescue, but has since undergone treatment and is now ready to look for her forever home. (stfbr.org)
So naturally, many of the dogs that are brought into rescue are heartworm positive. (aapaw.org)