AKC STANDARD: Gait – Viewed from the front, the forelegs should be carried well forward, showing no weakness in the pasterns, the paws landing squarely with the central toes straight ahead. The rear action should be strong and free through hocks and stifles, with no twisting or turning in or out at the joints. The hind legs should follow in line with the front. There is a slight natural convergence of the limbs both fore and aft. A slight roll of the hindquarters typifies the gait which should be free, self-assured, and jaunty.
Clarification: The Pug should be moved at a collected trot on a loose lead as befits a companion dog. Long, sweeping strides as in a Sporting dog would not characteristic of a dog with the build of a Pug. The slight "convergence of the limbs" occurs as speed increases.