i just tried to introduce my 6 week olds to some older pullets that are about to the laying stage. and i monitored them with me in the coop for about 2 hours, then i left the coop and checked on them about every 30 hour then i just let them go unchecked for 1 hour and i go back and my cochin was really bad. there is no more feathers on the side of his head. but none of the other young ones were hurt please help