As some of you know, Izzie is almost 12 weeks old. I understand that puppies chew on anything & everything (including my brand new shoes!)

That part, I'll get over. I also understand her chewing on the edges of the walls... The part that I don't get is the chewing of the WALL!!! She's chewing the paint off the middle of the wall. I live in a brand-new apartment, and I really don't want it looking "shabby" already. Plus, I'm worried that she's going to be swallowing these paint chips. Wouldn't it be nice if she would chew on one of the 5,000 toys she has instead?
I've bought "Chew-Stop" by Pet Organics. It doesn't seem to be working at all. I tell her "NO" in a stern voice as soon as I see her doing anything "bad." Would Bitter Apple work for this little trouble maker? Vinegar? Anything else? I would like your advice, before I go paying more $$$ on a product that doesn't work...
Thanks AGAIN! for your help!