I have a dirt run now. The dirt has become uneven, the hens make divots everywhere, and it's easy for rats to dig under despite my ground metal skirt. I've wanted to convert the whole thing to sand, but don't know how i should go about it to make it easy. I was thinking this order: - Dig out dirt and make narrow trench under the existing borders in order to bend my skirt down into it so that the skirt is vertical not horizontal along ground - place either bricks or 2x4 outside of the borders for the coop and run borders to rest on (with dirt underneath) - fill in like 4" sand to make it level with the coop and run borders. this is what i'm thinking of with my current setup at the right. Right now I have a skirt bent and attached to the outside of my 2x4s and going under my metal fence (dog kennel) run. does this seem like it would work?