So I just got back from the vets and not sure what to do. I need to get Khorra and Dakota on heartworm prevention and called the vets this morning asking about prices and what they had available. When I called I was told by the vet that I could get the heartworm prevention for a dog up to 10 lbs and that I could just cut it in half and give a half dose since the pups are only around 3 lbs each. I was fine with that. When I got there, the meds are really for a dog up to 25lbs. Again I was told that I could cut it in half and give a half dose. He also said that if there are any side effects within the next 3 or 4 days that when the next dose is needed next month, to only give a quarter dose. This has me very worried. I am not really comfortable giving my 3lb puppy a dose for a dog up to 25lbs, even if I am cutting it in half. The brand that was given to me is by Virbac and it's called Iverheart Plus. It is to prevent heartworm and to treat and control ascarid and hookworm infections in dogs. It also says that each tablet contains 68 mcg ivermectin and 57 mg pyrantel as pamoate salt. Does anyone have any advice on this? Do you think it's fine to give a half dose to them or should I try the quarter dose?