Ⅰ. Colostrum and Its FeedingThere are usually three kinds of calf feed, namely colostrum, dairy substitute, and calf diet. The milk secreted by cows in the first 7 days after delivery is called colostrum. The immune substances in colostrum are immunoglobulin, immunocompetent cell interferon, complement, and lysozyme. 1. Feeding timeAnti-disease substances of newborn calves mainly […]
