Determining the optimal level of buffel grass hay as a source of physically effective fiber in a diet with high proportions of forage cactus for sheep finished in the feedlot. - Coelho DFO; de Oliveira JS; Ramos JPF; Pereira DM; Macêdo AJDS; Oliveira CJB; Lemos MLP; Viana NB; Gomes PGB; Leite GM; Santos EM (Tropical animal health and production, 2026)