Part 1 of Essay
Police dogs have become a vital part of the police force. They are well trained, obedient dogs that, unlike humans, do not fear the daily challenges that arise on the job. Police units throughout the world use K-9 units. They are employed by most local police forces and by many governmental agencies. Police dogs can search ....

Part 2 of Essay
.... to use this training by tracking people and substances, despite on the job hazards. As man evolved, he began to use dogs to hunt prey and search for food. However, as he became more civilized, he needed to use dogs for more than those three simple things. He needed dogs to perform certain and specialized tasks. This is how selective breeding began. Certain dogs were used to herd sheep and were common on a farm. These dogs became known as Shepherd dogs. The German Shepherd in particular, is a late breed of variou ....