Pee training is a constant learning process. There where will be days (and even weeks) when you think have it and then an accident. So when you are at home be consistent. Just remember that he is a puppy . He is teething, etc... The chewing and tearing things up is a phase and he will get over it. Just let him know it unacceptable and make sure things are not in his reach as much as possible. Give him just enough space to eat, sleep and poop (maybe even some to play
)for the time being. As he grows older and gains your trust increase his space when you are not around. Our trainer told us we gave Annie way too much freedom too fast and that is part of the problem that we had with potty training her, (but I felt so bad confining her in too little of a space for such long periods of time
)