Here's a run cycle I made. It was my first time animating a horse.
I did that with the help of Emile Drugeon who kindly gave me his character and the rig he made from it.
The idea here was to push the extrem poses of a horse who starts running and turn it into a cycle (that's why there is a lot of movment on the head, like he's heading to his goal).
Playblast