I'm still in the planning stages for our coop (though hopefully will start building soon!) and was wondering about burying cinder blocks around the perimeter of the coop and run to keep predators/ pests out. The coop and run area will be approximately 10 x 5 for a maximum of 6 chickens (the most allowed by our town). The cinder blocks would be buried to a depth of 8 inches and the wooden coop and run would rest directly on top, with hardware cloth buried outside of the cinder blocks as an extra layer of protection against burrowing critters. Even though we are in town, we have a little bit of everything passing through our yard - including foxes. My question is, is the eight inches that the cinder blocks are buried deep enough to deter hungry wildlife, or does an additional layer of blocks need to be buried even deeper? I want some reassurances before I start on this project. Thanks!