There is an opinion that a small dog is much more often and more aggressive than its larger counterparts.
It is traditionally believed that the reason for such behavior of the "lapdog" lies mainly in its character.
However, this statement is not entirely correct, as reported by The Guardian magazine.

Why do small dogs often show viciousness? Finnish scientists have given a detailed answer to this question.
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Experts have conducted studies that have shown that the most angry dogs are miniature breeds. These include the Chihuahua.
In second place are pocket-sized poodles and miniature schnauzers.
Third place was taken by dogs belonging to the Labrador breed.
Further experiments revealed that small dogs experience more intense fear and anxiety due to their miniature size.
It is reported that it is precisely their small body size that makes these animals feel vulnerable.
Previously, we reported on how to get rid of the smell of cat urine .