Fox vs bone - outdoor pen update

My pet red fox Ron does so luv those small size rawhide bones!! He will devour it within a few hours, but plays with it for quite a while! We always find ourselves ’talking’ to each other, communicating in the little whines and yips of fox-talk! The large outdoor pen (about 700 .), soon to be his primary living quarters, is so close to being finished! It’s just been so hot! Was 101 degrees today... But as you can see, the corners are now escape proof, with a ’curb’ of cement binding together