It depends on the sibe you get. I have found most pups got from racing lines are more hyperactive than most pet/ show ones. mishka can get excitable & when she does get excited she tears around the house & garden , catapultes herself off of furniture too, ie--sofas, armchairs, so yes can be mad at times when playing, but settled in the home mostly, if content & properly exercised. can be very destructive at times too. so yes can be easily excited at times , but i love their madness & naughty character. you just need to let them know whos the boss.