PVC pipe beds are pretty neat to have to.
4 pieces of pvc and four corner connections and you dog has a nice bed to keep them off the ground. They sell them at dog shows but here is a link on how to make them. Make them to the size of your pup. Easy peasy and inexpensive!

http://www.dreamydoodles.com/2014/12/09/diy-make-sew-elevated-dog-beds-pvc-pipes/They also make nice sunshade covers for the top of expens.
You can make these real easy too. Buy shade cloth from lowes to fit the dimensions of your expen and add 4 plastic snap on grommets, cut hole out inside the grommet hole for the corners and 4 snap hooks and voila the dogs have shade! Makes a nice top for jumpers/climbers too.