I agredd with CC. it wouldnt hurt keep training her with the No bite etc. He wil get it eventually. These dogs are very smart. Also probably she has an Alpha personality like CC said. So you need to teach her now. I had the same problem with Gucci. It took us a while but she has finally stop with the biting a 85%. She still bites sometimes but not as hard and she wil stop when i say no biting. Good luck.
