Allison Brock and Rosevelt (Photo credit: Mary Adelaide Brakenridge) Wellington, FL – April 8, 2015 – Grand Prix dressage riders Allison Brock and Shannon Dueck are passionate about Brooke USA, the world’s largest international equine welfare charity. Brock, of the United States, was introduced to the charity and all that they do for working horses and donkeys by Fritz and Claudine Kundrun. She knew that it was important to bring awareness to it