Hello all - I hope your chickens are doing great and with-standing the heat and and steering clear of any potential predators! I am in the Design Phase of building a new Hen House. I've searched high and low for a used storage shed I could convert into a hen-house. Most are not made very well and then there's the problem/cost of getting it moved to my location. The Commercial ones they deliver or "build-on-site" are pure junk for the price they charge :-( So I've come to the conclusion I can build a much nicer one, designed exactly to my specs, for less money.... The one I'm planning will be 12' x 12' with an 8' (Shed type, Sloping) Roof. It will house 20 hens, and subtracting square footage from the interior walls, it would come out to be approx 11.5' x 11.5' on the interior - roughly 132 square foor, which equates to about 6 1/2 square feet per bird. I've been scratching my head on what type of windows and what size to select that would be appropriate for 20 hens.... I'm thinking Wide (and not too tall) horizontal sliders might work best. I could mount them up high and since they slide sideways I could keep the drafts to a minimum vs windows that are tall and raise from the bottom. Of course, if I got double-hung, I could open the top window instead of the bottom one. Any thoughts on window size and style, and mounting height? Thanks in advance for any help! - Dennis P.S. I have 10 RIR and 10 Barred Rock chicks to be delivered on August 4th. I already have a 3'x8" brooder for the chicks. (So I have a little time getting the hen house built and a run ready.) One other question: At what age should I move the older chicks to the new hen house?