Whats the name of the movie? chihuahua puppy in movie?

about a few years ago u saw a movie....popular....not sure what is about....dont remember....all i remember it being about drugs and guns...and all that good stuff....i think vin diesel was in the movie. the character had a little chihuahua....that looked innocent but in reality...he was trained to sniff drugs....and at some point during a drug transaction...the puppy lets the character know theres drugs in the car....im very sorry...all i remember about this movie is the chihuahua....any idea what movie this is?