I will start building a mini coop( 4x4 ft) for some Seramas or Dutch banties, even though it may take still 2 more years or so until my husband retires and we can have chickens. I got the plan sort of drawn and the rest is all in my head. it will involve crown moulding and hopefully be quite fance on the inside. The coop will be raised anywhere from 12 to 24 in off the ground, not sure yet. Prob. 18 in. What would be better CDX ply or OSB? i thought 1/2in thick should be good, since it will only house 5-6 pounds worth of chicken and the floor framing will be 16in on center. Also i will use either Vinyl tiles or sheet vinyl to cover whatever is use as flooring .