since you are giving rimadyl, i'd like to suggest adding some milk thistle in there too, rimadyl is hard on their liver. I didnt know that until I came here.
However, seeing as though shes clearly been to the vet on this issue. I recently purchased this petnat stuff off of this site. I cant believe how good it works! You go through alot to start off, but I noticed dramatic results in my boy. On the main page here, check in the store. I recommend it!
Courage is being scared to death and saddling up anyways. ~John Wayne