If you don't give them something to do

The horses will come up with their own games to keep themselves entertained.

I looked out the window to see the horses bunched up and going after something that was slowly traveling across the pasture. Then I grabbed the video camera to catch the tail end of their antics:

Cupcake's little blanket blew off and they all decided it was a threat worthy of stomping. It BLEW OFF, it is really that windy. The leg straps are all intact so I'm not entirely sure how that happened.

Talia stands over her prize victoriously