We have a 9 month old Great Dane, and he is absolutely out of control! He doesn't mind. He likes to jump. He runs wildly through the house. He won't get in his crate at night without a struggle. Is this all because he's still a puppy??? I've worked with him and taught him to sit which he will do sometimes. I also taught him to shake which was a mistake, since he does it when I don't command him to and ends up giving me a punch in the face :-/ (if I'm sitting down). Should I buy a shock collar or something?? I'm desperate!