I have a 12 x 6 foot run for a dog. All vegetation is of course dead, leaving mud. I understand that smooth concrete is the best, but it is out of my price range. Is there any downside to building what is essentially a wooden deck, like a deck for a house, for the dog? He sure likes lounging around on the deck, so it seems that he likes it. I was thinking a floor of the same type might be something nice for him when he is in the run.