They certainly help my
dog, I can vouch for that. She has been
on them now for 2 years. She used to limp very slightly
on a back leg which was once broken when she was younger. The vet said she would probably grow to develop arthritis in that leg, and it did seem things might be going that way, as any change in the weather to dampness, had her 'hitching' up that leg sometimes. Since starting the Glucosamine/Chondroitin supplement, she has not even done that once!