chicken running around in circles!!??

[alpacamama4420]

Hi, I have a buff orpington that is running around the pen along the fence line. Not running into things so she is not blind, but making these weird sounds and just following the fence line. I have 6 other chickens that are fine. What could be causing this?? She is about 3 years old and has been very healthy. Not sure if she has been eating today. I went to lock them up for the night and found her still outside. Picked her up and she seemed like she was very unstable. I put her in the coup and she wouldn't stay in her nesting box. She is on the floor of the coup still walking around and acting like she is dizzy. Not sure what is going on....... Anything on this would be appreciated!!!

 

[horsejody]

Is it possible that maybe she wants something on the other side of the fence? I've had hens act that way when I put them in the run or coop and they feel a desperate need to get to some fantastic nest spot that they discovered out free ranging. They run back and forth desperately looking for a way out. Broodies can be crazy.