I'm planning to build another coop (I got rid of my bird and sold my previous coop) and this time I'm going for broke and building on a permanent foundation. I want to do a layer or two of cinder blocks and then go wood framing up from there. This will leave a dirt floor, which I want to use the deep litter method for ease of maintenance. Is this a good plan or do I need some sort of covering for the floor? I have clay soil and I will have a french drain or something similar to keep water from entering on the uphill side.