The limp started about a week before he was diagnosed with diagnosed with diabetes. It lasted only a few days and went away. Then the limp came and went a few more times since then. Now he's limping all the time. It's his left back paw. The vet says diabetes has nothing to do with it. We've tried Cosequin and an NSAID. Neither did anything to help. Todays xrays show what looks like destruction of the bone in the left knee. The side view looks much better though. The vet is not ready to say it's cancer but said it could be. So we're going to have to see a specialist (who thankfully is in town) for a bone biopsy. Buprenorphine today and tomorrow for the pain. Hopefully the specialist can see him Monday. My poor baby. Any advice or words of encouragement would be helpful!