I have to chickens as of right now and every morning my barred rock does an screeching Caw CAW sound and I think it's because the EE chicken is still in the coop and she wants her out. I was thinking of maybe adding a third chicken that way at least one of them will be with the barred rock so she doesn't freak out. I found someone selling chickens that are 3 months old. Mine are 7-8 months old and are already laying eggs. Would it be okay if I just bought 1 three month old chicken and put it in there with mine.?