while ivermectin treats & orevents heartworm in dogs, it is also used for other things. there are several different methods to use, either seperate or combined. if it was me, i would go down to the feed store and get you some ivermectin 1%, along with a bottle of nu-stock. supposedly, "vetericyn" also rids dogs of demodectic mange, so it wouldnt hurt to add that to the combo. if you go to the vet, they will prescribe you ivermectin.