This summer I hope to build a separate coop for my silkies. Here is how I will make SURE that no predator can break into their run/coop area. 1. Make a 16- X 16-foot perfectly FLAT/LEVEL area on the ground. 2. Lay four 16 foot 2" X 12"s around the perimeter of area. 3. Lay concrete stepping stones 1/2" apart (for drainage) on the entire floor. 4. Fill the entire enclosure with contractor sand to the top of the 2" X 12" frame. 5. Attach 8 foot 2"x4"'s every four feet around the perimeter's 2" x 12" frame and across the top of the run. 6. Run 4 foot 1/2-inch hardware cloth going up the two by fours and across the top; attach it with screws and fender washers.