I had one. I had a female 'deer head' chihuahua named Pixie. She weighed 4lbs full grown and was a very timid dog. She was a barker, but we corrected that using a bark collar. (Only took her a week & after that she never had another problem)
Here's a picture of her
http://img.photobucket.com/albums/v1...i/P1010264.jpg