I have three 8 week old large fowl and ten 6 week olds (3 EEs, 3 dark Brahmas, 3 silkies, 1 red sex link). The size ranges between all the birds is crazy, one silkie is tiny and the largest EE is still about a 1/3 of the size of the 8 week olds. I have had them in separate coops and runs about a foot apart for the past 2 weeks and want to move them all into the big coop and run but I'm concerned. I also don't want to wait too much longer as the younger ones are outgrowing the current coop. Any tips?