Good luck with your breeding, I wish I could get mine to stop! 

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No. I haven't had a chance to create a door yet, so they're still in their 8'x8'x4' high kennel. They fly in there, but they can't really get going.Have they been free flying at all?
It doesn't look broken and it isn't hugely swollen. Maybe just slightly swollen and warm at the hock(???). I have no idea what that joint is called on a bird. I should know that with all the birds I have. Maybe it's just sprained? I'll get some Arnica and give it a try. Thanks!I had a pigeon that had a broken leg. It was everso swollen and I had to cut the band off. He mostly held it up but did walk on it occasionally. I would recommend maybe putting her in a cage for a week or so, so she can't fly and leg her leg rest. @biophiliac recommended to me to use Arnica cream to help reduce swelling and syphytum pilules to help with healing the bone. If yours doesn't have a broken leg or toes just the Arnica cream applied liberally on the leg should give some relief. It may be its just twisted it landing.
Mine made a full recovery but his leg is still a little larger where the bone healed. He was top cock until one of the youngsters made a challenge!
Does it have a band? It may have got caught on something, like wire, and struggled.It doesn't look broken and it isn't hugely swollen. Maybe just slightly swollen and warm at the hock(???). I have no idea what that joint is called on a bird. I should know that with all the birds I have. Maybe it's just sprained? I'll get some Arnica and give it a try. Thanks!
Welcome @nyc_flock - See how I used your quote to bring you over to our forum.I’ll check out the pigeon/dove forum. Thanks