Took Dutch to the puppy romp again yesterday. He had a blast, but part of the area had a padded mat, and the other part did not. He kept playing on the hard cement with this golden-doodle, and because the cement had gotten wet, he kept slipping. I was cringing because I know that hard surfaces are bad for him. Should I not let him play there again? I want to socialize, but I'm wondering if the cost outweighs the benefit.