Zoe came to us as a bounce who had broken her hock while racing. It was only casted and is rather knotty-looking. It was tender for a while. She jumps on and off things without a problem, but she will limp if she does zoomies in the yard. I think it is turning the corners, though, because she can jog short distances (1/4 mile) without any gimpiness. Her break was three years ago. I do have her on Synovi G-3 though as a precaution. She is 7 years old. Also, we live in Maryland and the winters can be cold and damp. I do have a leg warmer for her since I think the dampness would bother the leg. She doesn't complain, but I am a mom! She does love to play in the snow though