I do have a hen like this. She has trouble preening her back so we had to manually help her preen those parts she cant reach. I was also guessing it was from her gene and I could not find more information about it.
(1) Are you new to chickens / when did you first get chickens?
My first chicken was about 3 years Old. :))
(2) How many chickens do you have right now?
5 bantams and 1 big boi.
(3) What breeds do you have?
Not sure with their breeds : OEG bantams/Dutch bantam , White Belgian d'uccle Bantam,and...