Influence of virginiamycin on broilers fed four levels of energy.

An experiment was conducted with broiler chicks to determine the influence of Virginiamycin on chicks fed diets with four levels of energy. Addition of the Virginiamycin to the diet resulted in significantly improved body weight and feed efficiency at all levels of energy. The greatest improvement was obtained at the lowest level of energy. Addition of Virginiamycin to the diet decreased the energy required to produce a unit of body weight.