I'm converting a 4x4 dog house into a banty coop, and I'm having trouble planning out how to make the clean out door. My plan is to make the entire back wall a door, but I'm not sure how to go about doing it. Do you just use a saw to cut out the hole in the wall and use it as the door? We did that for our egg door on the main coop and it's flush with the wall...but there are tiny gaps in the wall where it was filed down so the door would hinge open and closed. I'm also worried about it warping as the dog house is made out of OSB. Also, I'm thinking it would be a good idea to make a slide out floor, but I have NO idea how to do that, haha. Any ideas? Here's what I wanted to do, but I just don't know how to go about doing it carpentry/hardware-wise.