Why are Chihuahuas aggressive when a larger dog approaches or a stranger reaches down? Barking and growling often reflect fear, discomfort, or past experiences rather than a fixed temperament.
Essential Concepts
Fear and experience matter. Related posts: [Chihuahua socialization tips](/chihuahua-socialization-tips/) and [how to calm a reactive Chihuahua](/how-to-calm-a-reactive-chihuahua/).