Boxer are VERY smart dont let there looks fool you. They can be to smart for there own good! My Bronx will hear a comand like "go lay down" meaning he is being a bother and the guests dont want to be loved on during the middle of the movie for the 20th time(he has a doggie pillow down stairs that he sleeps on during the day and he is sappose to go to when we give that command) so he goes and lays down buy the guest and his whole face just gives you one of those "well i am laying down" looks. They are also very stubburn! From my personal experance they never stop acting like they are puppies! My Bronx is going on 11yrs old and still out plays most of the younger dogs at the dog park!