Hills science diet adult urinary hairball control cat food provides precisely balanced nutrition to help support the health of the whole urinary system. Supports the health of the whole urinary system with optimal level of magnesium. Natural fiber comfortably reduces hairballs. Natural ingredients plus vitamins, minerals and amino acids. No artificial colors, flavors, or preservatives. Hills science diet is veterinarians? #1 choice to feed their own pets(based on an annual veterinary survey in usa)