I have six 12 week old ameracauna's and was wondering when is it safe to introduce them to my (6) year and a half and (4) 6month old hens. They have been in a 16x16 broody pen that is in the 100x60 ft fenced in area/run where they can be seen by but not touched by my older hens for atleast a month maybe more. The main run is plenty big to give them space and i can provide them with places to hide I just worry if they are big enough or not. Is it still to early?