Answers are grounded in this paper and cite their sources.
(2003). Effects of dietary inclusion of plant extracts on the growth performance of male broiler chickens. British Poultry Science: Vol. 44, No. sup1, pp. 43-44.
No takes yet. Share an insight, caveat, or question.
Lewis et al. (2003) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: