My rooster (4 1/2 mo.) has developed what appears to be a band of "molting" around his neck. I did not notice it yesterday, but can not swear it was or was not there. He is eating, acting his normal "bad self", crowing, etc... There appears to be new feather pins but the skin looks a bit reddish underneath, but I honestly don't know if that is his normal coloring or not. He is not scratching himself that I have seen. The birds are not free ranged but have a large enclosed yard. There are ten birds in a 70' sq. ft. coop and the yard is approx. 10' x 20', so over crowding is not an issue. I have not seen anyone = hen or the one other roo bother him in any way. Any ideas or suggestions?