I had one Hen do her own thing in the coop with other & all was fine all hatched chicks were fine, My 2hd hen ( in a different coop ) did not do so well. I have another one who is on eggs. I was thinking about blocking off a space around her nest box.. To keep her & the babies in and all other out.. Her box ( 12x 12x 12 ) is only a few inches off the ground ( silkie ) would a space 2 feet by 3 feet be enough for her? would it be better to use a soild wood wall or could i frame mesh fence & use that for a wall from the others?... we have had some cold nights so i do turn on the heat light for them.. in the coop are 4 other silkies & 1 roo.