Friday we found our roo with a toenail (claw? what do you call them on chickens?) completely missing. It bled a lot, but we treated it and it seems to be healing fine. Today there was more fresh blood in the coop. Jack was still fine, but I found Alice with one of her nails torn off and bleeding. It wasn't completely gone like Jack's was. They have been inside their coop/run. It's really icy right now and there are a few spots in the run with chunks of ice. There is also a cage in the coop housing two broodies and baby. I'm thinking maybe they jumped on the cage or something and tore their nails? There's no blood around the cage at all. Is there some sort of illness that could be making their nails weak or something? Both chickens with missing nails are Light Brahmas. ETA: This is the cage. There are no sharp points or edges and it now has a piece of carpeting on top to shield the mommas from flying poo.