The only problem I've heard of, is that ivm is very effective at killing heart worms. If your dog already has heart worms bad, ivm will kill them and leave the "tubes" where the heart worms were. You can see that this is a huge problem to have open tubes all through the heart. If your dog is worm free you should be fine. I am not a vet.
The only problem I've heard of, is that ivm is very effective at killing heart worms. If your dog already has heart worms bad, ivm will kill them and leave the "tubes" where the heart worms were. You can see that this is a huge problem to have open tubes all through the heart. If your dog is worm free you should be fine. I am not a vet.