We have 7 adult hens and 4 chicks that are 7 weeks old. We tried to put the chicks out in the coop with the older girls and they started pecking the chicks, we got nervous and took the chicks back out. That was 2 weeks ago when they were 5 weeks old. Now they are 7 weeks old. Should we try it again? We really need to get the chicks moved out in to the coop, they are out growing there brooder! At this age are they old enough and big enough to defend them selves? Thanks!