Dreaming about a chihuahua means you are a small, quiet person who seems shy at first but quickly reveals your vocal nature when given the opportunity. You are also an unexpected source of advice, or negatively thought of as someone who doesn’t know when to keep quiet.
Perhaps in the waking hours, it would be nice to tone it down if you are a bit of a chatterbox and never know when to shut up. Seeing a chihuahua can also represent someone around you who is too vocal about unimportant issues.