Baxter is 10 and he has always had a sensitive stomach. He recently had a pinched nerve and our vet perscribed Tramadol (pain), Rimadyl (muscle relaxer), and Librax (for nausea). After a week he is better but now he has diarrhea so I have taken him off the Rimadyl because she said it might upset his stomach and to stop if it does.
He has also lost some muscle mass through this. Now I'm trying to get him on a food that will help him gain muscle mass back, help my senior with arthritis, but most importantly be safe for his sensitive stomach. (I believe that my vet said that she believes that he has some sort of protein deficiency.)