A Chihuahua can become aggressive
Dogs can act aggressively out of fear. Early socialisation with people and other animals is key to building confidence, trust and love. Although Chihuahuas are small, they make excellent watchdogs (partly due to their acute hearing) and are very devoted to guarding their home. But keep in mind - this breed is completely unaware of their size, often going up against much larger breeds if they feel the need to protect their owner. For instance, if they feel their owner or territory is in danger, they will stand up to a Pit Bull without thinking twice. A Chihuahua can become aggressive, but they are not ill tempered. Since Chihuahuas have no or little comprehension as to their stature, when walking your dog - make sure it is always on a leash or harness to ensure its safety from other people and larger dogs. Early socialisation with people and other animals is key to building confidence, trust and love.