(1) switchgrass straw bedding pellets (Ernst Biomass LLC, Meadville, PA); (2) Omolene 400 Complete Advantage horse feed (Purina Animal Nutrition, Gray Summit, MO); (3) alfalfa hay cubes (Chamberlain Ranch, Challis, ID), and (4) Equine Pine Pellet bedding (Tractor Supply Co., Brentwood,...