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This study investigated the effects of different levels of prebiotic and peptide supplementations on growth performance, apparent digestibility of nutrients and fecal score in suckling Zell lambs. A completely randomized experiment was designed with a factorial arrangement of 3×2 containing 36 male suckling Zell lambs at the age of 10 days and with a mean weight of 4.4±0.33 kg for 70 days. The treatments consisted of 1control (without prebiotic and peptide), 2-0 g of prebiotic and 2 g of peptide, 3-1.5 g of prebiotic and 0 g of peptide, 4-1.5 g of prebiotic and 2 g of peptide, 5-3 g of prebiotic and 0 of peptide, and 6-3 g of prebiotic and 2 g of peptide per day for the experimental lambs in milk replacement. The results of mean feed intake and daily weight gain of experimental lambs showed a significant difference between experimental treatments (P< 0.05), so were higher in treatment of 2 g peptide and 1.5 g prebiotic. There was a significant difference in the apparent digestibility nutrients in DM, OM, CP and ADF peptide and peri-biotic interaction effects (P<0.05). In results of fecal score, there was a significant decrease in consistency score of 1.5 g prebiotics (P<0.05). Carcass traits significantly improved by treatment of 2 g peptide and 1.5 g prebiotic. There was no significant difference in the results of feed conversion rario (FCR) and body dimensions. The overall results showed, feed intake significantly increased by treatment of 2 g peptide and 1.5 g of prebiotic and improved daily gain and fecal score in some experimental periods as well as carcass traits in lambs.

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The Effects of Different Levels of Prebiotic and Peptide Supplementations on Growth Performance, Apparent Digestibility Nutrients and Fecal Score in Suckling Zell Lambs