I am getting ready to do the footing on my coup. The footing will be 1 foot wide and 1 foot deep all the way around with 8 inch concrete block on top of that, higher against the slope. will I need to add a dig proof skirting outside of the run to deter diggers? The floor will be dirt in both the coop and the run. The coop and run or inside a 6 foot fence area. I live in the mountains in the forest. My predators are bobcats mountain lions raccoons dogs and cats I have not seen possums up here, we have wood rats they make nest above ground, never seen one on my property. Oh ya, snakes too