I have an elderly Cairn Terrier called Jimmy. He has had a few problems lately with his back, which we cannot get on top of completely. He has had some X-rays that do not show anything, but what we do know is that his back goes into spasm, and it becomes quite painful and he finds it difficult to lie down and get up, especially after rest. In fact, sometimes his back looks quite arched. We have tried all the regular pain products, but my feeling is that these drugs do not work that well for him.