I have a mallard drake that recently sprained his leg so his been staying in his coop to heal. But I went outside to find blood on his hay and his bill bleeding. His coop has chain-link on the outside and chicken wire on behind it(it's for chicks but he needed a coop) so I think he may have gotten it caught on the chicken wire and scraped it. It doesn't look that very serious and he's acting normal but I'm still worried about it. It's that red spot on his bill. Please tell me what I should do about it. .