So I have 6 hens that I bought in the spring and they are laying now....I have 6 chicks that are 5 weeks old....Everyday I take the chicks outside and leave them run around in a fenced in area that keeps them close to my coop but segregated from the older hens....The hens really don't show much interest in the chicks but I know that is likely to change when I let the new chickens run in the coop with the older ones....When would be a safe time to let them in together?