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Abstract
Al-Saiady, M.Y., Kraidees, M.S., Tag Eldin, A.E. and Abouheif, M.A. 1997. Effect of supplemental poultry offal meal on feedlot performance and carcass characteristics of Holstein calves. J. Appl. Anim. Res., 11: 121–128.
Forty-two Holstein bull calves (16 wk; 130 kg) were allotted equally into three poultry offal meal (POM) supplementation treatments following completely randomized design. Half of the calves in each treatment were slaughtered after a 160-d growing period and subsequently the remaining calves were slaughtered after a 100-d finishing period. The dietary treatments were continuous POM-free diets, continuous 10% POM-supplemented diets and 15% POM-supplemented diet fed during the growing phase followed by 6% POM-supplemented diet fed during the finishing phase. The results showed that calves fed on 10% POM-supplemented diet had the fastest (P<0.01) daily gain, consumed the least feed/100 kg wt, had the heaviest (P<0.01) hot carcass weight, had highest fat percentage (P<0.01) in 9–11 rib joints and were the most economical as well as efficient (P<0.01) in utilizing feed than those fed on the other two diets.