Prior to Zekes cataract surgery he was laying around and acting depressed. I thought it was because he had lost his eyesight. Zeke's diabetes had made him blind due to cataracts almost immediately after he was diagnosed in July 2007. Once Zeke had cataract surgery in January 2008 the veterinary opthamologist put him on Rimadyl to reduce swelling in his eyes. He immediately started acting alot perkier and I thought it was because he was so happy he got his eyesight back.
Zeke had been on 25mg of Rimadyl twice a day. Ten days 10 days after the surgery Zeke deveoped some stomach issues from the Rimadyl so the veterinarian took Zeke off of the Rimadyl and I noticed he was not as perky as he had been. It was then that I realized that Zeke probably had arthritis and was benefitting from the Rimadyl. After a few days the stomach problems resolved and we put Zeke back on 25mg once a day. He did well on that dose and seemed perky and happy. He has been on Rimadyl about 4 years now and is doing well.
Years ago I had an older arthritic dog that we had tried the Rimadyl on and it did not do anything at all for her. After 3 or 4 months we discontinued it. So every dog is different.