I need my dog to learn to go on a potty training pad. I can't always take him out as much as he needs to and he won't hold it. He's a couple yrs old, so he's not a puppy but he's never grasped the idea of going on the pad. I tried them when he was a puppy and he would go everywhere except the pad. I'm going to be moving and renting in a few months so I need to get him trained.