There are many reports circulating around the Internet about injuries being caused to dogs by the use of the Revolution product. This is a new product that is supposed to prevent heartworms, fleas, intestinal worms and mange. Some dogs have been reported to have died and the guardians say that the only thing that they had done was use Revolution on the dog. We suggest following this story closely and carefully considering whether this product is the right product for your dog. Please talk to your vet.