Safe for both Cats and Dogs when used as directed. Ingredients: Water, Witch Hazel, Glycerin, Liver Flavor, Vitamin E, Aloe Vera Leaf, Organic Parsley Seed Oil, Lavender, Peppermint, Sodium Bicarbonate, Green Tea, Chamomile, Rosemary, Grape Seed Extract and Natural Preservatives. Directions: Massage Teeth and gums vigorously with a swipe a day.