Nope, for Apache it's not a phase. He has been this way since birth. I distinctly recall his breeder telling me he's so loveable but he will need obedience training. I didn't think much of it at first but now I know. Apache is just who he is and I love him for it even though he can drive me nuts sometimes. i wouldn't trade him for anything in the world.
Cherokee is such a good girl and so nice but she is more independent and loves you on her terms.
Apache on the other hand is very mischievous but has so much love and he's soooo cute.