My buff orpington has raised 4 lovely gold laced orpington bantams. They have been in a run next to the main hen house all the time and the chicks are now 10 weeks and mum is still with them. At what age can should I let them out with the big girls who free range the whole of the woods and beach? They have seen them through the fence all their lives, but even though mum is larger then the rest of the flock she was always bottom of the pecking order and I am worried she won't be able fend of attacks from the 3 other hens when I let them out. advice please.