Hen missing tail feathers

[Bonnie Jo]

I noticed my hen who just stopped being broody is missing her tail feathers. I know chickens molt in the fall-ish. Could this be part of the molt? Or is it more likely that the other hens have pulled them off of her because she is re-assimilating into the flock?

 

[CascadiaRiver]

Could be the other hens or molting. Our flock is molting right now and havent heard of birds molting at any certain time,