So, my chickens started their first seasonal molt in October, but now it's May and none of them have grown any feathers back. My RIR's seem to be losing more and more feathers. Especially my smallest chicken Penny. The others just have this bald patch near their tails. Except for one of my BR's, she never even started molting! What could be wrong with my girls? I've been giving them plenty of protien. Are they sick? What can I do for them? Thanks!