before my puppy I bought and read 4 books on shepherds including one entirely on training but honestly I've hardly thought about them. I found using a clicker and treats like cut up baby carrots got very good results. my guy learned sit literally in 5 minutes, although down took him several days. still, he was 8 weeks old at the time. your puppy did not read the books and is going to be his own little self. my advice is to research clicker training or take a class at petsmart/petco. I sat in on some with a friend who had a pug and it really helped using a clicker with my GS puppy. Petco would obviously like if you took a bunch of lessons but 2 or so to learn and rehearse using a clicker should be enough and save alot of money.
Tiger - 12/19/13