I have a flock of 15 young bantam chickens. They are all "supposed" to be hens, but were too early to sex according to the lady I got them from. Right now, they are about as big as a quail. I have a chance to add 5-10 normal sized hens described as follows: Production red from McMurray. Blue andalusian several mutts (1 white and a few black) Black star Rhode Island/Production red I am told the flock is mellow if that helps. Any ideas on introducing them? Just keep them separate for awhile and hope for the best?