My run is exactly as you described yours except I have the hardware cloth going up a bit higher and buried around the sides. I did put a roof on and recently got the a kennel shade over the top. That made a world of difference in the temp. I have food both inside and outside until two nights ago...
I have 20 or 30 bags of sand that I had to level a "blow up" pool and was looking for uses for them. I read a few posts that sand would be good in my run. It is 10 x10, should I spread the sand in there or will I regret it? They have it down to dirt now. Will it be any cooler, hotter? Will it...