I am new to the chicken world. We are having a coop built and I've ordered ten 8-10 week old pullets that we'll get in May: 4 salmon faverolles, 4 olive eggers, and 2 americauna. We live in southeastern WI. Question right off the bat! For the site for the chicken coop, we will need to add something to raise it up a bit and make it level. Do you suggest sand, gravel, etc? Or is a cement pad best if possible? We then will have pine shavings over that in the run and coop. Thank you!