I've read a lot of old posts and it seems to be a common issue. I have had him since he was a couple days old and a couple days ago his rear legs were very swollen. He is eating esbilac puppy formula with added heavy whipping cream. I also give him oralcal and he has a UV light to help with Vit-d. His legs are not swollen anymore but he won't use them, now his shoulders are very swollen. At first before the swelling started he was lethargic and had no appetite. He also had diarrhea. I got that under control and his appetite is really good but he can't really move much. I have infant ibuprofen and I may have clavamox. I am going to weigh him in a min. ANY SUGGESTIONS.