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Two experiments were conducted with broilers to determine the effect of Virginiamycin supplementation on performance and shank pigmentation. Virginiamycin supplementation at 10 ppm resulted in significantly increased body weights in both experiments. Feed efficiency was significantly improved in Experiment 1 by the supplementation of 5 and 10 ppm Virginiamycin. In Experiment 2, 20 ppm Virginiamycin was included and resulted in no greater response than that observed at 10 ppm. Pigmentation values as measured by a reflectance colorimeter and Roche color fan favored (P less than or equal to .05) Virginiamycin supplementation in both experiments. Data indicated that when the diet was supplemented with Virginiamycin an increase in the utilization of xanthophyll resulted. Mortality was not influenced by dietary treatment.
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January 1976,
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R D Miles, and
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R D Miles, and
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June 1990,
Poultry science,
R D Miles, and
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DTW. Deutsche tierarztliche Wochenschrift,
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Asian-Australasian journal of animal sciences,
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Poultry science,
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Applied and environmental microbiology,
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December 2005,
Poultry science,
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January 1992,
Avian diseases,
R D Miles, and
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