Yes. Cats Incredible™ is used and recommended by leading Veterinarians because its prevention of potentially toxic ammonia in the litter box. The renowned Veterinarian and Author Dr Karen ‘Doc Halligan”, DVM serves as Chief Veterinary Officer for Lucy Pet Foundation and Lucy Pet Products. After studying the results of the third party field tests on our litter, and using it with her own cats, Doc Halligan has endorsed Cats Incredible™ primarily because it helps eliminate ammonia exposure as a potential cause of upper respiratory infections in cats.