Last night something tried to get into my chicken coop, but was unable to. Rooster came out of coop reluctantly this morning and seemed to stumble and act as if he was drunk and blind. not chasing the girls around and crowing like he usually does. I had to go to work and when I got home, he is the same. Now he is laying in the pen with his head dropped forward and beak in the dirt. If he startles, he opens his eyes and will weakly stand up. Could he have a concussion?? I'm thinking maybe he heard an intruder outside and tried to defend his girls and somehow hit his head.... Has this happened to anyone else?