These dogs are considered to be the most aggressive

While they might measure as the smallest dogs in the world, chihuahuas are also thought to be one of the most aggressive in the world. It’s believed their small size is what makes these dogs so prone to lash out towards strangers and other animals.


However, don’t let their size fool you. These dogs have the biggest brain compared to her bodies meaning they quickly pick up new tricks. Plus, originating from the desert means the breed prefers to stay away from the cold or wet weather.

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