Kova, a 3-year-old Labrador Retriever, doesn't get paid for her job detecting explosives for the State Highway Patrol. Instead, she sits when she detects one of the 30 scents she's trained to find.

Both K-9s are now certified for both patrol and detection work. K-9 Hasko, a four-year-old German Shepherd, just joined the police department in April. Hasko has worked with his handler, K-9 Officer ...