Tis true about Chows. I had a Chow mix and while I loved the **** out of that dog, she would fight any dog that came near her. Even my aunt's Great Dane.
Or one of the rare affectionate, non-detached and serial killer like Shiba Inu's that I occasionally meet. I'd lie and tell the uninitiated that it was a ****ing fox, just to scare them/make them think I'm awesome.