Loyal guardians and highly trained, K9 dogs play crucial roles in public safety and military operations, thanks to their sharp sense of smell, bravery, and deterrent capabilities.

K-9 officers need to have a variety of attributes, such as intelligence, stamina and an ability to quickly react to commands. ... These dog breeds make the best police dogs ...

The idea that certain breeds reliably exhibit distinct behaviors is baked into dog shows, obedience training and canine DNA tests, not to mention laws targeting breeds deemed prone to aggression.