My 2 BLRW & 2 LF Cochins pullets are 21 wks old. No eggs or signs of wanting too. I have noticed that this past week they are very prickley with each other and the 21 wk old cockeral sometimes seems to have to get between them to seperate the fuss. They have been together since hatching. What's up with the change in attitude??? It's not constant and they are only confined at night and free range all day in an acre fenced in so it isn't a space thing. Thoughts??