The Dr. Elsey’s Litter Box Attractant is an all-natural, proprietary blend of herbs that works by emitting a scent that naturally attracts cats and kittens to use the litter box. This litter box attractant is designed to help bring cats and kittens back to the litter box after they have been trained to use it. It is also great for training purposes. The Dr. Elsey’s Litter Box Attractant is available in a 20 ounce pouch that lasts three months and treats up to 100 pounds of non-scented clumping clay litter.