Pet Space Indoor Pet Grass In Stock, Ready To Ship Today. Great for: Dogs, cats, rabbits guinea pigs, birds and other pets, crates, patios, small kennels, and indoor areas Clean and Tidy: Comes in leak-proof 18" x 26" PET (plastic) reusable container, with easy to follow instructions. All natural, biodegradable, and specially formulated Therapeutic Lawn No chemicals or pesticides and no bugs!