treatmentsThe protocol for the experiment was approved by the Langston Uni-versity Animal Care and Use Committee. The study was conducted in anenclosed building during January to March, 2012, with lighting providedfrom 07:00 to 19:00 h. The experiment was 10 wk in length, with five 2-wk periods. Thirty-six Boer goat wethers were used, with an initial ageof 285 days (SEM = 5.1) and body weight (BW) of 34.4 kg (SEM = 0.90).Wethers were allocated to six groups for similar BW (P > 0.99; t-test) andvariation