My brown leghorn is about 5 months old, and she still has a healthy appetite and is active. A couple days ago I noticed that her comb looks like it's rotting - it's pale and eaten away and has black edges. The day we noticed, she also had blood coming out of her beak. So maybe she's being picked on? She seems withdrawn from the rest of the flock. The other thing is some of the other hens also have sores on their combs and wattles. From what I read it could be pox? These are my first chickens so I have no idea what could be wrong or what to do.