I have a 15 1/2 yr old lab who is in pretty good shape considering his age. About 1 1/2 yr. ago his back legs got stiff (arthritic?) and the vet put him on Rimadyl which worked great- for about 8 months. Now his back legs seem quite weak and as if he doesn't have much feeling in them- he hobbles and occassionally falls; he lays down with both legs fully extended. Tried aspirin and Glucosamine- no response. Vet has no ideas. He's not in pain; he tries to run but can't, which breaks my heart... Any ideas beyond Rimadyl?
The next step is steroids such as prednisone. vetcare