Effects of zinc-methionine on performance of Angora goats

Effects of supplementation with zinc-methionine (Zn-Met), a source of potentially rumen protected methionine and zinc (Zinpro 40, Edina, MN), on mohair growth, BW gain and blood metabolites were investigated in Angora goats. Forty yearling Angora goats (20 wethers and 20 doelings) were offered a basal diet (11.2% CP, 22 ppm Zn, 2.3 Mcal/kg DM) at 4% BW of DM for 120 days. The treatments (1–5) were: 1, 3 and 5 g/day of Zn-Met, 150 mg/day of zinc oxide and control (no supplementation). Supplementation of the diet with Zn-Met (1, 3 and 5 g/day of Zn-Met) increased (P 0.56). Plasma methionine concentration was not affected by Zn-Met supplementation (P > 0.53). In summary, supplementation of a Zn-adequate diet with Zn-Met increased ADG by yearling Angora goats regardless of level of Zn-Met added. Supplementation of 1 g Zn-Met may have positive effect on ADG and mohair growth when diet contains about 20 ppm Zn.