I have a new coop and am moving it to a much better location in my yard. It is going right between a concrete, covered dog run and a concrete, covered patio. The concrete slabs on both sides go up from the ground about 5 inches. How many inches can I have between the coop and the concrete slabs for me to not worry about a racoon not having enough room to dig under? Hoping to circumvent needing an apron at least on one side maybe?Thanks anyone for the help.