Wow, what great feedback from everyone, thank you all so much. The vet will be coming out in March to do routine springs shots and teeth, so by then we will know about his response to the hock injections and I can discuss with her the possibility of things like Lyme, EPM and the other thing I thought of was ESPM. I have also thought of SI issues on his spine as well. All of these things are good areas to check into if we need to go further down the line. My pocketbook (and husband) hopes we don’t have to do that though.