Hello and welcome! Really sorry to hear about Abby's problem. Arthritis at two years of age and severe? That's an awfully early onset. We had the same problem with Lynn, but she was 13 then; she was on NSAIDs for over a year, but I'm afraid that all drugs for arthritis have side effects whether it's NSAIDs or steroids, and keeping your pup on these for a number of years might be pretty risky. Hopefully there's somebody who's been through a similar ordeal and has a better idea.