No, there is not usually. I blindly did not see it (obvious) in your photo. Also, they don't typically molt at 8 months of age, either - though I didn't know their age before making my post. My apologies.
How many hens and roosters do you have? Have you noticed any aggression or mating behavior...
It appears to me she's molting, and it's normal. All of them probably are, as are everyone's chickens who live in the Northern Hemisphere. When daylight grows shorter, it triggers hormones that cause chickens to lose their feathers. Some all at once, some a little at a time. New feathers grow...