UPDATE: I let Attila out of the penalty box around noon to mingle with the flock. At first she was fine, probably for about 30-40 minutes... then she started chasing the littles for no apparent reason. The chicks were all laying down napping - and she walked towards them, and attacked. It's not like they were trying to share or take her prize food, or take the best dust bath spot... it was just random nastiness. So I acted immediately, & put her back in the penalty box.
Around 6 pm, we let her out again. She was mellow and behaved within the realm of what an adult hen should do - with new, 9+ week old chicks... no aggression was detected, so we let her stay out. There were no issues.
But I was constantly checking - and then it began to get dark... and everyone started moving into the coop as normal. Good sign. Watching from the camera, I saw 7 chicks hop up through the chicken door - into the coop, and move up onto the roosts... ugh... then in walks Attila. They all scattered as she lunged at them, they were flying up the walls, hitting the windows, smashing into each other in a panic to get away from her. She was pecking & biting at them and they ran out. I watched her climb up on the top roosting bar and settle there. No one was in the coop now, except her.
Then, the chicks began to go back into the coop, to try again... and she attacked anyone that tried to climb up onto the roosting bars... even when they were at the far end, about 5 feet away & no where near her.
I ran outside at this point, and got her out of the coop, and she's back in the penalty box out in the run.
She's been on that roost with 6 other chickens last year this time, that were all her age when her group of chicks came in. I'm starting to wonder if she's crazy... or mental.
Now we move onto plan 2: Tomorrow my husband will help me put the pinless peepers on her. More to come.
OMG! I have mixed feelings about putting a camera in the coop, sometimes it's better not to see. However, in this case I think it likely saved the other chickens. My chickens seem to be settling in a bit more. I brought the littles out with the hens for their afternoon yard break and they did pretty good. A little chasing and the littles ran back inside the coop & run. One of the littles came right back out after a few minutes. Then the littles were actually hanging out in the run for a bit as well. My rooster is starting to be a PITA, so I have made one chicken saddle and will make four more. Once I have the hens outfitted I plan on letting the rooster out of confinement. Hopefully that will take care of any remaining angry hen issues. Good luck with the pinless peepers.