I recently put our broody Buff Orpington hen with our 3 wk old chicks to see if she would foster them.She hasn't attached them but doesn't seem very interested in them either.We have 8 chicks hatching the 21st and want her to care for them so was trying to see how she would react to the older ones before we made the decision.Any suggestions or should I just hand raise them myself and not bother?