I've been searching thru posts, but most of the time people are integrating younger chicks into their established flock. I have 3 very sweet 8-week old girls that have been outside since week 2 and "free ranging" in their attached 20' X 40' pen for more than a month. Plenty of places to hide under the asparagus or under the weeds/bushes, and a huge compost pile to search for treasures. Everything is going swimmingly. Do I dare rock the boat by adding 2 laying hens? Or are they really too young? Thanks!