A total of 360 Hy-Line W-36 laying hens,26 wk of age,were use dina223 factorial
arrangemen to ftreatments consisting of 2 cage densities [5or7hens/cage(4045 cm2)],
2 supplemental vitamin C levels(0and500mg/kgas L-ascorbicacid),and 3 supplemental
Cr levels(0,500,and1000 μg/kg asCrMet)