Did they at least put down a sheet of plywood first before dumping the cement?
Tell ya what though, you will be VERY glad of a concrete pad! Makes cleaning up a breeze. Just make sure the doggies have a soft place (I put deck boards, fairly widely spaced, over the concrete) or they will get pressure marks on their elbows. The calluses don't look as ugly on a black or chocolate as they do on a yellow, but they are still unattractive.
We are still toying with the idea of covering the concrete with indoor/outdoor carpet to cut down on the heat. We'll have to think of something.