I was out checking on the hens and one of my tetras is walking in circles. She walks in a circle puts her head down to her feet like she is looking at the ground then picks her head up and continues in a tight circle. The other day i noticed she couldn't figure out how to get out of her yard to the pen to our yard i had to show her how to walk to door. I thought it was odd but didnt think anything of it, yesterday again all the hens i let into the big yard and again she couldn't figure out how to get from her yard to the big yard .. Today she is walking in circles.. If i walk and call her she walks and runs fine to me but once she stops she starts the circling all over again... I looked up what it could be but am not really sure what it could be. Some internet stuff said NCD some internet said wry neck)which her neck isnt bent) some internet said mare jus some said maybe she hurt her head or got pecked really hard on her head.