The mama Beagle stray that we found a home for has heartworms. I'm not surprised. The young couple that took her will have a hard time paying for the treatment. The vet did say Millie is a heck of a stray, a purebred for sure. I know treatment costs vary over the nation; we live in Mississippi and wonder whether anyone knows approximately the cost of treatment here. We took in a stray once who had heartworms and couldn't afford the treatment. My vet said it is possible to give Heartgard to control the heartworms. I read online that the adult worms won't be killed but won't be able to propogate and when the adults eventually die, the dog will be free of heartworms. Could anyone offer advice?