My three 10 week pullets are in a small coop and run. They have been introduced to the older girls through a wire fence. for about 2 weeks now. They are very anxious to get into a larger run, they keep jumping to get out. My other 4 hens are 8 months old. Would you suggest I try to let them out and if I do and it works out will the layer's be able to eat grower/raiser feed until the young ones are ready to do layer? How would I separate the food?