Welcome to the world of the ultra intelligent horse! My Saddlebred/Arab X mare is incredible. She walks up to field fencing and just puts a hoof on it and SMOOSH it's down far enough for her to eat the grass on the other side. She can jump a house and will if she can't smoosh the fence down. The neighbors cows took down our common fence enough that she just walked through the wires, pushed one down and ducked under the top, to join them in their pasture. She steals fencing tools when we're out fencing, which thanks to HER is OFTEN, and tries to "help". When we built our barn she stole the hammer when we were nailing on the decorative trim and tried to help hammer the boards in place.
The only solution to her escaping that works for us is, a powerful fence energizer and the electric braid, strung about 2 feet inside the field fence to keep her AWAY from it. So far she hasn't decided to just extend the width of her jump and gone over it. Eventually, I can see where she would, so we're already trying to plan more secure fencing.
Out of 10 horses, this mare is the smartest, most opinionated, destructive without meaning to be, adventurous, fun, horse we've got. Whenever something is down or broken we go looking for Patti.