Last Sunday I got 5 RIR pullets, approx 6 mos old. They were overcrowded in their former home and on a diet of layer pellets. I noticed that one of the girls is missing feathers on her throat. One of the other girls is missing some around her ears (I assumed that was from a roo?) and the others look fine. I have no idea if this feather loss is due to pecking, molting or something else? Thoughts?