I have no clue how it happened all the chickens where In the coop so I shut their door and went in to make sure everyone was there and ok like i always do and to check on the baby chicks we just got today. She was sitting up on the brooder box with a older hen. She was with an older hen on the box. I had to take her out side so I could see better once I saw is I went inside the coop with her to check to see if there was any evidence on any of the other chickens or where she was sitting and not a drop of blood in sight. She likes to sit up on the fence like a naughty little bird and has bent it. It could have caught on the fence it was to dark to really see. My cousin suggested a predator got to it. Although they have a pretty good canopy of branches above them that is a possibility.
As for what I did nothing but put her in a cage in the coop so no one would be able to peck at it. I have no clue what to do my grandma suggested in the morning use peroxide on it.
You'd be better off using a 50/50 betadine water mixture flushing the wound, do your best to avoid her eyes. Then pack the effected area with neosporin or triple antibiotic ointment. Continue to pack with antibiotic ointment until healed.
Keep her caged and provide her feed and water.
hmm I'm not so sure it wasn't one of my other chickens that did it to her. EVERY one of them today seemed in a grumpy mood and was picking on (that's putting it nicely) each other as soon as i let them out this morning. it could just be they are acting like that because they know one of them is hurt... hopefully