If the breeder stated he was potty trained w/ a doggie door, I doubt he would pee on you if you hold him! I used to hold Jackson all the time as a pup even before he was potty trained and he never pottied while I was holding him.... so I wouldn't worry about that. Just keep your eye on him 24/7 and make sure. He's in a new strange place and is just getting acclimated. He will be fine!
