Getting the horse to go forward

Screen Shot 2014-07-28 at 11.43.30 AMThis filly is pretty stuck on her friend who is tied to the wall at the left of the screen. She blocks and evades my requests to go forward at the trot, wanting to stop and stand by her friend.

In this clip I am reinforcing herd rules and giving her the same answer as before when she tries to block or evade. By giving her the same answer every time I am able to get her to move forward at the trot freely. The way I approach this is the same way the herd leader would approach it which makes it much easier for the filly to understand.