Last fall I built a four run kennel just like this and I have really been impressed with it although it's not done. I am adding a two dog run off of the back of my shed. I used Behr Deck Over to paint it. I want to insulate the shed, add water and electric and use rough cut in the walls and ceiling. Also add heat for when I'm in trouble and have to hang out in there.
I bought vinyl coated 1x1 wire, I need to paint it, frame up doors and trim and hang the plexi glass slam doors on the boxes. It seem like I'll never get finished but I enjoy adding on. I'll post pics of the progress. Here is the four dog I built last fall but it needs finished too. I'm going to cover under the kennels so the poop slide isn't visible but can easily be accessed.