Safer"s Critter Ridder Ready-To-Use Animal Repellent is an effective dual-action spray that uses ingredients such as oil of black pepper, piperine, and capsaicin to create an unpleasant environment. It repels by releasing an intense odor and taste that is safe for the animal, but overwhelms their senses, quickly teaching them to avoid the area. Critter Ridder is effective against dogs, cats, groundhogs and other animals. 940ml.