I have 10 9wk old chickens and 4 6wk old chickens, all were raised from day old. The older birds have been out in their coop/run for 3.5 weeks and I'm ready to put the younger birds out to join them. Besides providing hiding places for the younger girls, should I anticipate any major trouble integrating with birds this young? All have been handled daily and are not particularly skittish or bold and I have not observed any negative or bully behaviors with any of the older birds. I am hoping to have a smooth transition and advice is very welcome.