Your method is not working because you are rewarding her bad behavior with a chew toy instead of correcting it. You live in NYC or upstate I can help you I am a professional dog trainer. You need to discipline every time she bites. I suggest putting a leash and prong-collar on her all the time so you can yank it when ever she bites which will teach her that the behvior is not wanted. She will pick it up within a week and then you can take the collar off.