This morning after I opened the coop to let everyone out, I looked in the roost area/nest box area to see if I had any eggs, and saw blood all over the foil I put down over the wire floor. Horrified, I examined the chickens and found that my one Barred Rock, Cuda, was all bloody where her comb is starting to grow up (she is six months and still quite immature). I thought everything was fine out in the yard, but then I noticed when I put out a pear for them to eat, Cuda was getting pecked. I have isolated her in a dog crate for the moment. I am treating her wounded head, of course. She lost a lot of blood, and it horrifies me to think of her stuck in the coop all night getting pecked like that. Why would they suddenly turn on her like this? And will I be able to reintroduce her to the flock successfully once she has healed? Any advice would be much appreciated.