Another suggestion for whatever you decide to build: raccoons loooove a chicken dinner, and they WILL find the weak points in your coop. They have paws like hands,and they are relentless and intelligent. I started out raising chickens with the idea that the wire fence, and the wire on the windows was to keep the chickens IN! rrrrrrrrttt! WRONG! It has to keep all the hungry critters like 'coons, possums and skunks OUT!
After a number of costly break-ins,where the 'coon would get in and kill as many chickens as he could, or pull chickens against a chicken wire fence and eat what he could pull through that fence, I finally ended up with a virtual chicken fortress
. You have to understand that a chicken roosting at night will just sit there and let itself be killed-there is nothing smart about a chicken. I kept a live trap set outside often, and continually caught huge raccoons, possums,and skunks. I used to leave the chickens out during the day to forage, and if I got back there a bit too late in the evening to close them back up, I might find a skunk in the coop
. They want the eggs, but didn't seem to be much of a threat to the chickens. I'd yell, and bang around on the back of the coop, and the skunk would waddle out and go away.
After coyotes moved into this area, I couldn't leave the chickens out in the day any more-they would get into the treeline and get bushwhacked. Before that, I had a few episodes where a marauding dog would catch and kill some of the chickens when they were out. Hawks will get them,too. Like I said, there is hardly any carnivore out there that doesn't want a chicken dinner.