What is the primary role of colostrum for newborn lambs?

The primary role of colostrum for newborn lambs is to provide essential antibodies for immunity. Colostrum is the first milk produced by ewes after giving birth, and it is rich in immunoglobulins, particularly immunoglobulin G (IgG). This is crucial for newborn lambs because they are born with a limited ability to produce their own antibodies; therefore, they rely on colostrum to receive the maternal antibodies that will help protect them from infections and diseases during their early life.

These antibodies are absorbed through the lamb's intestinal lining within the first few hours after birth, which is why it’s vital for the lamb to nurse immediately. This passive immunity is a key factor in ensuring the health and survival of newborn lambs, as they have not yet developed their own immune systems capable of fighting off pathogens.

Although colostrum does provide some vitamins and energy, its most critical function is the transfer of passive immunity. This makes it essential for the overall health and development of the lamb in its formative days.