I just wanted to advise everyone that may have any questions regarding the use of safeguard, or any other horse/cattle paste wormer, in dogs. Safeguard will kill 4 types of intestinal parasitic worms in dogs. You can also use Ivermectin for a monthly heart worm preventative. We have been using safeguard and ivermectin on our dogs for years. Has no adverse affects. Most vets will advise you not to use this method, but think about the money they are loosing by telling you that you can.