Predator scent has long been known to trigger the fight or flight response in small animals of prey. The larger the predator, the larger the prey that can be intimidated by the scent.Wolf urine scent is particularly frightening to many animals, even larger ones such as der and coyote and scares them off quickly. Place around the yard in areas where small unwanted pests are an annoyance. Repeat the application every couple of weeks or after heavy rains. Available in a 4oz, 8oz, and 16oz bottles.