Both cats and dogs get arthritis, it's just like with humans there is no cute. Glucosamine helps a lot it doesn't cure it or help the pain but it helps to reverse the arthritis. It slowly starts to relubricate the joints, it takes a while to start working but after a while you really see the results. However I would talk to your vet before giving her glucosamine, your vet will check him out and let you know for sure if it is arthritis and let you know what the proper dose of glucosamine should be. It pretty inexpenisve and you can find it at most pet stores or drug stores.