New Zealand's police and detector dogs are competing to be top dog.
The 2017 National Police Patrol and Detector Dog Championships start on Monday for 23 teams from around the country.
Teams from police, customs, corrections, aviation security and the army are all contesting for trophies, says Inspector Todd Southall, who is a referee.
Inspector Southall says the competition involves a range of activities designed to test the unique skills of the dogs and their handlers.
"These are the challenges we train our dogs for and we try to ensure the scenarios are made as realistic as possible," he says.
"They include some tough situations, including day and night-time activities throughout the Wellington and South Wairarapa regions."
The competition will finish with a ceremony at the Police Dog Training Centre in Trentham on Wednesday where Deputy Commissioner Viv Rickard will present the prizes for the winners of each category.