I noticed one of my Brahma hens has stopped eating and drinking much in the past few days so I took a closer look and found that one side of her face has some strange swelling. The skin around the corner of her mouth up to part of the beak has become almost bubbly-looking lumps that are hard to the touch. The swelling is also inside her mouth, which must explain the lack of appetite. And while checking her out I couldn't help but notice that she has this nasty rotting smell about her. I've never seen this condition on my chickens before, and it must not be contagious, because all of my other 20 chickens are fine. Still though, I'll keep an eye on them in case. Anyone have some ideas as to what this is or what to do about it? She's losing a lot of weight, which makes me worry that she can't last long like this. Right now I don't have access to a camera that's good enough for you to see the swelling, but I'll see if I can find one tomorrow.