Hi,
Many of the behaviors described in this group are just like the ones Ivy displayed. Teeth falling out (several at a time), suddenly running to the window and barking (9 months), chewing up the floor, sofa, shoes, etc. If you find a book on raising puppies, it will explain that all of this is quite normal and part of development from puppyhood to pre-adolescence, etc.
Now that ours has just turned one, I'm happy to say she listens much better than a few months ago. She is still very active, but unfortunately, the chewing continues. She has now set her sights on our book shelves and has been dwindling down my collection one (or two) books at a time. We could use some help in how to handle her latest delicacy.
Hang in there folks, it will get better (most of the time). Keep them busy and give positive feedback for good behaviors. Oh yea... and have a lot of patience!