We have 9 chickens total. We have had them since hatching in July 9, 2012. In that we have 2 roosters a Jersey Giant and a light Brama. I am concerned about the stress the hens are getting for two roosters "tag teaming" the hens to mate with them. So far there is no aggression between them. It is ok to have two roosters together is my first question. The second will having the 2 roosters be too much stress for the 7 ladies?