I have two 2-month old Easter Eggers and want to put them in, before long, with the 8 hens in my existing flock, of mixed breeds, who are 10 months old. RIght now the size difference between these 2 groups is considerable and I'm concerned the EE's could be killed by the larger ones. I read somewhere that it is good to put the new hens in on the roost at night with the existing flock, so that they are less likely to notice they have newcomers. However, it seems to me that I should also wait until my EE's are a bit older because right now they are just SO much smaller than the others, less than half the size. At what age is it safe to place them with the rest?