This study was conducted to evaluate the effect of chelated zinc (Zn) (ZinMet) and manganese (Mn) (ManMet) on broiler performance, processing yield, and incidence of breast myopathies. A total of 1,280-day-old male YPM x Ross 708 broilers were randomly distributed among 4 treatments and raised to 46 d of age on 1 of 4 diet regimes with or without chelated Zn or chelated Mn and Zn. All diets were formulated to include 100 ppm supplemental Mn and 100 ppm supplemental Zn and formulated to be equal in methionine concentration to account for the methionine contribution of chelated Zn and Mn. Treatment 1 contained 100 ppm Zn and 100 ppm Mn from ZnSO4 and MnSO4; in treatment 2, 40 ppm Zn from ZnSO4 were replaced with chelated Zn; in treatment 3, 40 ppm Zn and 40 ppm Mn from ZnSO4 and MnSO4 were replaced with...

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