I've been thinking about this lately, glad you brought it up! I'm not sure what to use either. After Samson had orthopedic surgery on his broken leg I was told he would have some degree of arthritis in that leg at some point no matter what. I started him on some glucosamine treats but stopped when his allergies started up because they had grain in them. Never found a replacement. I'd be interested to see what other products people like. I am sure it is a good idea for any bulldog because I know so many get arthritis.