Nothing! Chihuahua's are pure-breds. They are the original breed, nothing was combined to make them.
Yes. My friend has a Toy-fox Terrier/Chihuahua mix.
Chihuahua and the Yorkshire Terrier
Chi-poo
A Chioodle
kind of big.
Chihuahua and Pug mix
A chihuahua and a pug mix is called a chihuapug.
A chihuahua and poodle mixed are called a chi-poo or a wapoo. Other variations include poochi and choodle.
It's a nickname for the cross breed that is mix of chihuahua and pomeranian.
A Chorkie is a chihuahua/yorkie mix that can be long or short haired.
about 5 or 6 pounds