the movement of horses

Bolting horse. I just wanted to give a feeling of speed, and the sound you get when a horse gallops - at once very light and very hard. They appear to move so lightly, you forget the amount of force that is going through their legs into the ground.

Hindquarters. I just wanted a feeling of strength in this sketch. In a way it's quite still, despite the whispy tail. 

Playful horse. Sometimes horses express a lot of contained tension when they play - they pinch their lips and their nostrils together and flatten back their ears. Their movements become very grounded. It's as if they're winding up to let loose. And they soon do, with a big buck or a gallop!