2 supplemental vitamin C levels (0 and 500 mg/kg as L-ascorbic acid), and 3 supplemental Cr levels (0, 500, and 1000 μg/kg as CrMet) with 5 replicate cages per treatment. The hens were kept in wire-floor cages in an environmentally-controlled room. After a 2-wk
adaptation, the 70-d study was initiated and it was divided into two 35-d periods (28–33 and 33–38 wk of age).