Nature's MACE Cat Repellent-1 Gallon Concentrate Our Technology Safely and Effectively Stray Cats. Cat repellent that acts as a nasal irritant deterring pets Ideal outdoor use: gardens, lawns, and landscaped areas. Indoor Use: basements, cellars, and storage areas Repellent is designed to train animals to stay out of the areas Effectively repels dogs, groundhogs, skunks, cats, squirrels, raccoons, chipmunks and other nuisance animals Guaranteed 100% to Repel Stray Cats