Most aggressive dog breeds named in study

New research shows which breeds of dogs are most aggressive, and examines what other traits can contribute to aggression.

Scientists from the University of Helsinki studied the behavior of more than 9,000 dogs from about two dozen breeds, the Daily Mail reported. They found that small dogs were more likely to behave more aggressively than medium and large dogs.

Scientists also found that males are more aggressive than bitches, and their neutering does not affect them becoming more or less aggressive. In addition to size and gender, the study also examined age and anxiety as factors for aggressive behavior.

Rough Collies topped the list of likelihood of aggressive behavior, followed by Miniature Poodles, Miniature Schnauzers, German Shepherds, and the Spanish Water Dog.

The study was published on May 3 in the journal Scientific Reports.

This segment was broadcast live on KTLA 5 on May 4, 2021.

This graphic was included in the study “Aggressive behavior is influenced by demographic, environmental and behavioral factors in purebred dogs” published in Scientific Reports on May 3, 2021 by researchers at the University of Helsinki.

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