I recently adopted a 1.5 year old housebroken dog. He's house broken but I am away from home for work and can't make it back to let him out. He is holding it till I make it home. I am gone for about 11 hours! I did get some of his urine on a napkin when he went outside and dabbed it on the pad but still no go. He hasn't had any accidents in the house but I am afraid that when he gets much older, there will be consequences. Any ideas?