My terrier bitch broke her hock when a pup. It was put in a spint (which she successfully removed every few days) and she was pretty much immobilised in a cage for several weeks. She healed very well, I think because she was young and her bones were still growing very actively. She is fine now, sometimes she 'skips' a bit behind, the way some terriers do, so maybe she is a bit arthritic, but generally it does not hold her back. She is five yers old now.
Hope your dog does well too.