We live in the city and I built a 3' x 3' (9 sq ft.) coop and planned on getting 4 hens. We have found a lady who wants to sell 5 Buff Orpington pullits and wants to sell all 5. They will have access to about a 40 sq. foot secured run at all times (except in extreme cold). Is my coop just too small for 5? We do plan on letting them range in the back yard when we are at home. I thought about making a "loft" at the taller end of the coop. Would that help?