I also strongly recommend the ex-pen. I have the ex-pen set up with his bed/toys/water in one end, a pee pad in the opposite end. I leave the door to the pen open during the day and he trots off in there when he needs to go and comes back out to where I am. Took only 2 weeks for him to master the pee pad and is fully trained now. Also makes it easier when he is left at home alone (which doesn't happen very often) he has all of his things and a place to "go". Pee pads and this pen have been a great training tool for Oscar.
