State and federal officials are warning horse owners not to feed their animals Top of the Rockies brand alfalfa cubes after nearly 100 horses developed neurologic illnesses — 45 of which have died or been euthanized. The U.S. Food and Drug Administration issued the warning Saturday. Manzanola Feeds of Manzanola, Colorado, recalled the cubes Friday. The company directly distributed products to stores in 10 states including Arkansas, Colorado, Illinois, Kansas, Louisiana, Missouri, New Mexico, Oklahoma, Texas and Wisconsin.