Pedro is a small, slender brown Chihuahua with a darker brown tuft of fur on his head. He has short whiskers, long ears, and black eyebrows.
He is silly, distracted, and a bit childlish. He also speaks with a Mexican accent.
Pedro is seen at the Dog Pound, in the middle of two bars. He sleeps in straw that looks like a nest. He is usually seen singing or howling with his friends. He only says two quotes; one is: "Pardon me, amigo. What is this 'chili heel'?" The other is: "And my sister Rosita Chiquita Juanita Chihuahua, I think." After Lady leaves the pound, he and his friends are not seen again in the film.
- It is unknown what happened to him and his friends at the end of the movie.