They are man's best friend but a criminal's worst enemy. We see them sometimes on television sniffing out drugs and explosives. Their swift actions to subdue criminals make them valuable partners with the police in the battle against crime. In order to get a thorough understanding of their work, 50 Junior Police Call (JPC) members from Tsuen Wan visited the training base - the Police Dog Unit at Queen's Hill. Instructors first briefed the JPC members on different types of dogs, such as the German shepherd, Rottweiler and Dobermann. Two canine partners then performed their tasks on the pitch, including basic obedience drills, attacks, and searching persons and property at the command of their handlers. 'We were impressed by their professionalism,' Yip Chi-ho said. 'We all cheered when the dogs did well. 'The co-operation between handlers and their canine partners was amazing,' he said.