I'll admit it...my chihuahua isn't 100% pure chihuahua. He is 1/8th of something else, a md. size dog. I really can't remember the breed. They say that's where he got his height (he's a bit bigger than most chihuahuas, but not huge), and his curly tail.
Any ideas as to what the other breed is? If not, it's not a big deal, I'm just curious.