I live in Minnesota and am working on plans to build my first coop to accommodate 5-6 chickens. My plan is to build a 24 sq.ft. coop, which from what I have read is the advised 4 sq.ft. of coop space per hen. There will also be a 72 sq.ft. attached, covered run for the chickens when they are not able to free range. I have access to an abundance of non-treated wooden pallets that I want to use to frame the floor and walls of the coop and I will cover the pallets themselves with cedar. I plan to build a walk-in coop for ease of cleaning, etc. but know that by doing so (as compared to a raised coop of the same size) will create additional airspace that will need to be kept warm during the winter. I understand the importance of year-round ventilation of a coop but I'm wondering if it would be recommended that I insulate the coop given it's size (4'W x 6'D x 7'H at roof peak) and my location. If insulation is recommended, should I place it between the pallet walls throughout the coop or in just a few areas? If I don't add insulation will the two layers of wood on the pallet walls (sandwiched between the cedar) insulate sufficiently? Or perhaps putting cedar on both interior and exterior pallet walls would make the space too tight... maybe it would be best to put cedar on the exterior only and leave the pallet showing on the inside coop walls. Any feedback is greatly appreciated! Thank you!