I am new to raising chickens. I received some baby chicks back in April. It soon became apparent that I was missing my cockerel. A month later I received 4(!) (they told me they had a 3 chick minimum shipping requirement). I read somewhere never to place smaller chicks with bigger. So they are separated but in the same coop so they can see each-other. When can I safely put them all together? I tried once last week, the result being the boys getting beat up by the girls. What is the typical time it takes for the cockerels (New Hampshire Reds) to be the same size as the pullets (Plymouth Barred Rock, Plymouth White Rock, and Australorp)?