Foxy is a perfect name. and she sounds lovely. I aytomatically pictured her as a red color, but this sonds better! We'll be waiting for pictures.
And the comment about Chewy, and being aggressive because he is not a pure bred, is just sibling rivalry......it was just meant to hurt, but don't let it bother you, we all know the truth, and that is it can happen with equal frequency with all breeds of dogs. mixed or not.