We haven't built anything yet but have plans drawn up. We can't cement anything with the ground because then we have to get permits and have someone licensed do the work and we are running on a massively tight budget just building coop and run and getting broader and feed etc. I have been told someone saw a coyote within 10 miles, foxed (not seen in my area directly as we are an urban area by a very busy highway and shopping area) And we also have opposum and hawks which we plan on doing some type of covering to keep wild bird droppings out of the coop so most likely plastic?
The ground here is VERY hard, compacted clay that's almost like cement once you get down about 3 inches or so. Even with like a spud bar you can't hardly get through it. To till up the garden we needed a massive industrial strength tiller to get through it.