This study reveals that only 2.2% of all dogs were rated as aggressive. However, by breed, the cocker spaniel figure exceeded 4%, and in Chihuahuas it exceeded 4.2%.
Being more specific, in the case of the English cocker spaniel —the one with golden fur— aggressiveness reaches up to 12.1%, being higher than that of Rottweilers (7.46%), which are reputed to be the most aggressive of the world.
The scientists carried out studies on about 1,400 English Cocker Spaniels and came to the conclusion that 7% of those with a more uniformly colored coat were more likely to be much more aggressive than those with a mixed coat, whose aggressiveness was not went from 3.7%
It should also be noted that the aggressiveness is far from the lethality or the degree of damage that one of these dogs can do, compared to others that have a much more powerful bite and teeth that can cause much more damage.