The vet came today to check for infection. She said we either needed to wrap the skin flap up to attempt to get it to heal back on or sedate him and cut it off. She felt the healing time would be lessened if we attempted to get it to reattach. She felt that was the best option so that's what I decided on, though it makes me a bit nervous due to infection concerns and scarring (not for cosmetic concerns but for future range of motion). The vet did say she did not think it could've been stitched.
The injury happened right before my BO went on vacation (out of the country). She recommended keeping him stalled (since the leg was wrapped) and walking him 2x per day since he'd be stalled 24/7. She also recommended the vet visit to check for infection. The vet told us he didn't need to be walked, but that's another thing I disagree on. I feel like he could get stiff and go a little stir crazy if never allowed out to exercise. She said it will need to be wrapped (wrap changed every day or every other day) at least 2 weeks, and that seems a long time for a horse to be in a stall without being exercised.
There is no swelling in the wound and it looks very clean (though the flap looked pretty nasty). He is not limping, but the bandage makes him a bit hesitant about walking. The vet gave him a tetanus shot and put him on Uniprim (preventatively, since I don't think there were any signs of infection).
Any advice would be appreciated.