It is important to supplement essential vitamins to the young calf until the rumen is fully functional at six to eight weeks of age. Blood levels of vitamins A, D3 and E are marginal at birth. Vitamins B1, B6, B12, niacin and biotin are not synthesized by the neonatal calf until the rumen is developed. Ten milliliters (cc) of Calf Pro provide 25,000 IU of Vitamin A, 6250 IU of Vitamin D3 and 100 IU of Vitamin E, plus B vitamins.
Studies show that when calves were fed 100 IU of vitamin E in the milk diet during the first 28 days, they had less scours and increased body weight gain.