Dr. Elsey's Cat Attract Litter Additive contains a scent that naturally attracts kittens and cats to use the litter box. It was created through years of observing and testing cats in shelters and Dr. Elsey's clinic. Indusrty statistics show that non-use of the litter box is the number one behavioral reason cats are abandoned, abused and placed in animal shelters. Designed for cats who are not using their litter boxes, Cat Attract is the first litter additive to specifically address this problem and provide a clinically tested and sonsumer proven solution. Just 20 ounces of this patented product (one bottle) will treat 100 lbs. of medium size particle, non-scented scoopable litter. It is not inteded for use with paper, conventional, pine, perfumed, cedar, or litters containing baking soda. We recommend Precious Cat Classic or Precious Cat Ultra scoopable litters. Mix 1/4 of the contents of the additive bottle with a freshly filled litter box containing 20-25 pounds of medium sized particle, non-scnted scoopable litter. Add 1/8 of this additive when-ever you add more litter.