A photographer tested the concentration of several pairs of dogs as he captured their reactions in a series of photos -enticing them with treats. Christian Vieler, 47, from Waltrop, Germany, who has been a professional dog photographer since 2016, came up with the idea of shooting two dogs catching treats simultaneously. The series of images, published in September 2017, show dogs including a pair of Labradors, two Border Collies and a couple of Bassett Hounds as they hope to become the ultimate good boy.

A photographer tested the concentration of several pairs of dogs as he captured their reactions on camera while enticing them with treats. Dog photographer Christian Vieler, 47, from Waltrop, Germany, has been shooting man's best friend professionally since 2016.

Vieler Photography/Caters News