Nope - ours is 4' no-climb, with cap boards, and on the stud pen, electric wire on upright insulators around the top. I have two horses over 17.2, and never had a problem. The stallion I had in training for a while, never challenged that combination, even when (inadvertantly ) tempted with a mare in heat. Love, love, love no climb. I think though, the next time we put some up, we'll do as the Virginia Tech people did - smart!