Winter molt?

[EngeFamilyFarms]

we have 7 chickens and 3 are Plymouth rocks. One seems to be loosing feathers and looking rough down to one tail feather. The others are nice and plump. Could this be a 9 month molt? Just curious why it is only one bird. They are 10 months old. I attached some pictures so you can see our one girl next to the others

 

[Wyorp Rock]

Looks like molting to me. As to why in a 10month old Not quite sure. I have a
9-10ish month old NH that is molting, none of the others that age are molting. First time I've had any bird molt that was under the age of 16-18 months.
https://the-chicken-chick.com/molting-what-is-it-and-how-to-help/

 

[Cindy in PA]

I had about half of my 13 chickens do a real molt at 8 months last Thanksgiving, something I never saw in the previous 24 years. Don't know why.

 

[aart]

Have had a 9 month old do a partial molt in late fall....and have read of many others in the last couple years.