Treatments were
randomly allotted to the pens. The experiment had a
completely randomized design, with a 2 × 2 factorial
arrangement of treatments: low vitamin A (Lo, no supplemental
vitamin A) and HMC (LoHMC); LoDC; high
vitamin A (Hi, supplemented with 2,200 IU of vitamin
A/kg of DM) and HMC (HiHMC); and HiDC.