Hello, I have some ISA Browns that are molting. some of the older hens/roosters peck their bald spots so much that they jump out of the run. I herd that chickens feathers grow in the summer, and molt in the winter. this has been going on since July/December 2012. I've seen two of the bald ones snuggled and shivering. Will the feathers grow back anytime soon? Thanks!!!!