Patton and Twisther Clear for Victory in North American Junior/Amateur Jumper Challenge, Foster, Sommers, Farish, and Pilla Win Tricolors   FOR IMMEDIATE RELEASE Upper Marlboro, MD – October 5, 2013 – Saturday of Capital Challenge Horse Show highlights the country’s young rider talent with championships for pony, junior and children’s pony hunters. The Grand Pony Hunter Championship was awarded to Madeline Schaefer on Armani. Ashley Foster on Sin City and Samantha Sommers riding Small Affair picked up the top tricolors in the Small and Large 16-17 Hunters, respectively, while Sienna Pilla was the Children’s Hunter Pony division champion