There are two wild animals that deer fear most: the coyote and it's cousin, the wolf. Because deer have horrible vision, they rely a lot on their sense of smell. If whitetails think wolves are near the perimeter, they will run away from your property. For this reason, Deerbusters recommends that homeowners apply wolf pee around yards and gardens to create the illusion that wolves are present in the area. Deerbusters Wolf Urine will not harm the environment or plants. This 32 oz. wolf pee is effective against elk, white-tailed deer, cats, coyote, moose and bear.