Sounds like you have a normal puppy

My Chewy ( 6 month old Aussie mix) was so aggresive till abotu a month ago! He would attacke our Sheltie Teddy for no reson. For awile there I had deced I would never get another puppy EVER! Not if they are going to be like Chewy! Geesh he bite me, he ignored me, he hated me unless I had food, he hated his crate, he never listned, he was just an all around little devil. But you know what made it worth while in the end? The whining from the other side of the door when I was in a room and he wasn't, the look of sadness when I locked him in his crate, his happy puppy bark when I came home, him following me, always haveing to sleep by me on the bed at nigth, his love for me is what I beleave got us through. Your pup, I promise will grow out of her bad habits that you hate with a little bit of help. Chewy rarly nips any more, He has stoped destroying chairs and coffie tabls and has turned into the perfect dog I have always wanted. A little loud sometimes. But he is a cutie! Just rember she will mellow down and things will get alot better.

Ashley