The movement is free, smooth and tireless, with a minimum lift of the feet, conveying the impression of the ability to move with great stealth. The action, viewed from the front, should be straight forward and true, without weakness at shoulders, elbows or pasterns. Viewed from behind the quarters thrust with strength and flexibility, with hocks not close nor too far apart. When trotting, the dog's feet tend to come closer together as speed increases, but when the dog comes to rest he should stand four square. Any tendency to stiltiness or to cowhocks or bowhocks is a serious fault.