Safer's® Critter Ridder® Liquid Animal Repellent is proven to keep pests from invading your yard. The dual-action formula 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. The 940 mL spray protects target areas for up to 30 days, leaving time for you to enjoy your outdoor space!