I had never heard of a whippet either. But I have looked on the internet and found some pictures of some that are brindle and thier face looks like Faith. I have always wondered in the back of my head if her brindle didn't come from a boxer. She has a very wiggly butt like my sister in laws boxer and she boxes like a boxer. But who knows. I just know if you look up whippet boxer mixes on the internet you will find some dogs that look alot like Faith.
But yes if I could show this to my neighbor, maybe she would stop being such a freak about Faith. I doubt it but who knows. All I know is no matter what she is, she is not going anywhere because she is my baby so neighbor might as well get use to her or move.