Hi all. We have our first set of 25 heavy breed chicks coming in March from Murray McMurray and are busy constructing this coop design. It's being built inside of an old cow barn with a poured cement floor and solid walls. The ground floor of the barn is about 30x70 in total and a bit drafty, so we're currently rebuilding the doors and replacing some boards to keep it warmer. The perimeter of the inside coop area has 4' walls with chicken wire from the top of the wall to the ceiling joists. We plan to put down a nice layer of straw throughout the inside as well as some pine shavings for better absorption. The idea behind the enclosed roosting area is to give them a smaller sleeping hut to keep warm in. We're in Michigan and regularly see single digits during the winter. They'll have free access in an out of the roosting box, as the entire inside coop area is predator "proof". Is the ~460 square foot of indoor area enough space for 25 adult birds to lounge during the day until we get the outside run built and secured? We plan to fence in about 2 acres behind the house eventually and allow them to free range, but for now they'll have the 30x15 area outside. Lots of nasty critters runnin around here looking for an easy meal. Any other thoughts/concerns with this layout would be appreciated. We've spent countless hours researching and preparing for our first flock, but its a bit daunting having never done this before!