hey girl, oh, Rainer's quite in the habit of chewing herself instead of toys.
we used to put hydracortisone on it and then wrap it up with doggie bandage. that worked well when we were around only! the cone idea is pretty good and now they have this soft type which is a lot more comfy (not sure if they would fit her though since she's so small), you could give that a try.
ps: we've tried bitter apple as well when she was a puppy, and it worked well for a couple months, after that she might have become immuned to it or something