A chihuahua is a mammal.
It’s weight can only get upto about 2 to 6 pounds (1 to 3 kilograms).
Chihuahuas are not endangered there is alot of them left.
Chihuahuas height is to get upto 6 to 8 inches (15 to 20 centimeters).

This informtion was found at http://facts4me.com.