First let me say hi to everyone on BYC! I'm new here and am new to keeping chickens, but have ordered 5 hens for mid June delivery to give myself the time to get a coop and run in order. I am planning a 15'x10' fully enclosed run with a fully covered top with a height dropping from 7' on the front to 6' on the back. I want to do a raised coop (with a dust bathing area under) of 4'x6', but am wondering if this will be enough space in the coop for the hens. Also, I have planned ventilation at the top of the coop, but wonder if I also need a window for more summer ventilation. The hens will be spending a fair amount of time in the run as well, being let into the yard an hour or so on week days, and for most of the day when off of work and I can supervise them (we have hawks, eagles, and two species of owls patrolling near the yard), so will 15'x10' be large enough? Thank you in advance for any advice you can give me, I just want to be sure the hens will be happy and healthy.