Many cats and dogs experience joint flexibility and mobility issues as they age due to normal daily exercise and activity. This is why veterinarians often recommend a healthy diet complemented with health supplements to help alleviate occasional discomfort associated with routine daily activity. NOW® Pets Joint Support is a health supplement formulated by renowned veterinarian Dr. Barbara Royal, DVM, CVA, founder of The Royal Treatment Veterinary Center. For use in Dogs and Cats only.