colostrum is rich in the very food that the baby calf needs.
After the calf is a few days old, colostrum changes to what is commonly known as milk.
colostrum, ko-los′trum, n. the first milk of a mammal after parturition.
By nursing the colostrum out of the breasts, it will favor and hasten the secretion of milk.
1570s, from Latin colostrum "first milk from an animal," of unknown origin.
colostrum co·los·trum (kə-lŏs'trəm)
The first milk secreted at the time of parturition, differing from the milk secreted later by containing more lactalbumin and lactoprotein, and also being rich in antibodies that confer passive immunity to the newborn. Also called foremilk.