While integrating a new group of "teens" with our adults, half of both groups being polish, one of our young polish roos was attacked and sustained a head injury. I ran out when I heard a ruckus and he looked dead. There was only a bit of blood on his head, other than being knocked out, he looked good. I brought him in, put him in our first aid dog crate, feed him vitamin enhanced water by placing spoonfuls under his beak, and then had to leave to pick my kids up from a camp. I didn't know if he would be alive when I got home, but at least he was in a quiet space and safe. When I got home he was up and gingerly pecking at some food. He hung out for about a day and then seemed back to himself. When I brought him food and water he repeatedly asked to rejoin the flock so after another half day, I let him. Brought him back out with the teens and he immediately wanted to challenge the other polish roo (both were suppose to be pullets!). I kept him quite and separated the flocks for a couple of weeks and now we are working through integration of the flocks again. To improve matters we are adding space and roosts so that there are many places to escape attack. Since this event he is terrified of my older hens, continues to be top roo among the teens, and has become even more friendly to people. He comes running when I call his name and will chose to follow me rather than the teens when out foraging. So he is recovered but my worry is that he seems less stable on his feet than the other youngsters. He's showing some very mild signs similar to another polish that I had that was very friendly but eventually lost balance, leg and neck control, and became really skinny. At the end we kept hr in, she liked being held, and she passed in my lap as I read to my kids at bedtime. She had balance and leg issues from the time she was a pullet that got dramatically worse one day last winter, with her dying in the early spring. I have wondered whether she sustained a head injury. I love the personalities of the Polish, but their less armored heads sure make for a lot of stress.
I'm using my daughter's account right now, but just wanted to respond, as we are dealing with the aftermath of a polish head injury also.