Simple Solution Stain + Odor Remover (1 Gallon Refill) is specifically formulated eliminate tough dog and cat odors and stains. Stain and Odor Remover has a unique formula that contains Pro-Bacteria* and enzymes (specific to pet messes) that work together to break down, neutralize pet stain odors, and permanently eliminate stains and odors. Also discourages dogs and cats from repeat marking the area. Safe to use carpet, upholstery, or other water-safe surfaces in your home to remove urine, feces, and vomit. Safe to use around children and pets when used as directed.