Almost every state and there cities have a K-9 unit. But if you're like me, your not to sure what they exactly are and how they work. Well there are many different kinds of K9 units, like patrol dogs, narcotic dogs, arson detection dogs, and explosive detection dogs. Plus K-9 units have two helpful new technology pieces to help then protect there canine partners.

Patrol dogs are trained to protect its partner. The dog is trained to bite under two circumstances. The first is when the officer commands the dog to attack. And the other is when ever an aggressive move is made towards the officer the dog will attack. A patrol dog is also able to track and trail a person. They can follow scents which are several hours old. They can't be fooled by fake tracks or if other animals cross the trail. Dog breeds used...