A Colostrum is First milk following calving. High in fat, protein, and immunoglobulins that may be directly absorbed by the newborn Calf in its first 24 hours of life.

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Other /More definition:
A Colostrum is First milk following calving. High in fat, protein, and immunoglobulins that may be directly absorbed by the newborn calf in its first 24 hours of life.