As for wrapping this cut pastern, I would have only done that the first several days, as wrapping was not needed after that. She was still a bronc those first few days, so I didn't get to wrap it, but it was fine regardless. Now, she's a doll to handle, and I'm riding her. Yesterday was day 24.
Other leg wounds, particularly those with nasty raised surfaces, I find wrapping greatly helps to smooth the tissue and prevent proud flesh. Once the tissue is smooth and level, I find they do best unwrapped unless it's a large wound. I believe the key is knowing the best time to stop wrapping, as wrapping for too long a period can hinder the process.