ONA, any time he does that, BACK him up a good 50-100 feet. Any time my boys want to rush back to their paddocks, I oblige. By backing them up the entire way. About half way they're thinking, "Alright mom, I'm sorry!" but I always back them until I get to the middle of their paddock and let them stand. If they try to rush their head out of their halters(Henny was bad about that at dinner time) I'll stand there and wait until they're standing nicely before I take the halter completely off.
There on the tips of fair fresh flowers feedeth he; How joyous his neigh,
there in the midst of sacred pollen hidden, all hidden he; how joyous his neigh