@junebuggena @gotro17 Yes, there is that window in the door(faces West) it's open & has HW cloth over the opening & then windows we cut with HW cloth over on the North & South walls & right now there are just little vents in East wall that was already in there.
Greetings and welcome to BYC! Very nice home for your chickens. As has already been mentioned, the ventilation is not adequate... What I did was place gable vents on both peak ends:
http://www.lowes.com/pd_39913-52595-GLPG1824G_1z0uax0__?productId=3284216&pl=1
I also left the rafters open under the roof and covered those openings with hardware cloth and window screening (to help keep mosquitoes down). I then created horizontal vents near floor level and covered them with hardware cloth. You want fresh air to enter low and pull the heated, moist, fouled air, up and out at the top. You don't want that air flow to hit the birds where they roost, so place the openings appropriately. There's no such thing as "too much" ventilation... only too little. It doesn't look like you have rafters that you could open/vent through. Another option would be to put a wind activated vent on the roof.
https://www.zoro.com/empire-ventila...gclid=CLOQ-9_0k80CFQ2QaQodqDYObA&gclsrc=aw.ds
You can see what I'm talking about regarding ventilation on my coop if you click on my coop link in my signature.
As for the roost, it's a little high for them to get to right now, but when full grown, they should be able to get up there with a leap and a flap. So for now, if you made some graduated step platforms for them or a ramp, but they can most likely be removed when the birds are full grown. The bigger problem is coming down off the roost... They fly down at a 45 degree glide slope so they need an adequate distance to not hit the opposite wall. As for the nest boxes, you won't need them for several months more so I wouldn't put them in there right now. The birds will learn to use them as resting places rather than their intended purpose. Most LF (large fowl) pullets (females less than a year old) reach POL (point of lay) between 22-26 weeks. Of course some start earlier and some start later.
I noticed that you covered the entrance to the underside of the coop with hardware cloth also. BRILLIANT!
Not only will it keep your birds from going under there to dust bathe/hide/lay eggs/go broody/etc. but will also help keep mice and other unwanted pests from going under there and causing problems/issues. Just keep in mind, it needs to extend at least 12" down into the dirt to keep diggers from going right under it. Also, the birds will scratch dust bathing holes right next to it, so if not buried down some, it will open access for them to get under and odds are, they will not be able to find where they entered to get back out.
Good luck with your chickeneering!