Effects of supplemental concentrate level and forage source on intake, digestion, and behavior of growing and yearling Boer goat wethers and evaluation of a method of predicting negative feedstuff associative effects

TitleEffects of supplemental concentrate level and forage source on intake, digestion, and behavior of growing and yearling Boer goat wethers and evaluation of a method of predicting negative feedstuff associative effects
Publication TypeJournal Article
Year of Publication2017
AuthorsDolebo, AT, Puchala, R, Gipson, TA, Dawson, LJ, Sahlu, T, Goetsch, AL
JournalJournal of Applied Animal Research
Volume45
Pagination470-479
AbstractEffects of supplemental concentrate level and three sources of grass hay were determined to evaluate a method (www2.luresext.edu/goats/research/suppconc.html) of predicting impact of negative associative effects between feedstuffs on metabolizable energy (ME) intake by Boer goat wethers. Forage DM intake (g/kg BW0.75) was similar between growing and yearling wethers (34.9 and 30.8) and ranked 0 and 15 > 30 > 45 g/kg BW0.75 of concentrate dry matter (48.5, 41.8, 25.9, and 15.2, respectively). Age and concentrate level interacted in NDF digestibility (57.3, 60.6, 61.4, and 58.4% for growing and 56.6, 62.9, 56.8, and 30.0% for yearling wethers with 0, 15, 30, and 45 g/kg BW0.75, respectively). There was a tendency (P = 0.074) for an interaction in ME intake between age and concentrate level (361, 530, 634, and 709 for growing and 363, 547, 541, and 555 kJ/kg BW0.75 for yearling wethers with 0, 15, 30, and 45 g/kg BW0.75; values predicted for treatments with supplement were 563, 631, and 619 for growing and 575, 684, and 697 kJ/kg BW0.75 for yearling wethers with 15, 30, and 45 g/kg BW0.75, respectively. In conclusion, ME intake was accurately predicted for the low level of supplementation and moderate level with growing wethers.