My male cat was 1 1/2 years old when we found out he had arthritis. I was quite surprised since he was so young. The Dr prescribed Cosequin, within 3 days there was a remarkable difference. He has been on Cosequin for 6 1/2 years now. I mix it with the juice from his moist food and with the exception of his playing hard to get, have never had a problem giving it to him. I would highly recommend this product.