For 5 (with 3 bantams) the minimum floor space would be 14 sq ft, though more would be better for integration purposes. Just make sure if you are going to expand the overall floor space via where your current access is that the new access doors still allow you to reach every corner of the coop.Coop is currently 10sq feet (2.5x4), how much more space do you suggest I add for a total of 3 bantams, an Easter egger and a welsummer? 15-20 sq feet total?
Thank you!