There’s an urban myth that dairy farmers rear calves away from the herd so we can harvest the special buttercup-yellow milk that comes with the first milkings after calving called colostrum. The irony is that one of the main reasons we collect calves early is to ensure they get plenty of colostrum.
According to a Dairy Australia fact sheet on colostrum management:
“Unlike humans, the placenta of the cow keeps the maternal blood supply separate from that of the unborn calf. This prevents the transfer of antibodies from the cow to the calf before birth and the calf is born with no ability to fight disease.”
“Colostrum is the substance that provides the antibodies that form the main protection from infectious diseases for the calf in the first 6 weeks of life, until the calf can develop antibodies of its own. Without colostrum, a calf is likely to die.”
What’s more, calves need it immediately, as DA goes on to explain:
“It is important to be clear about two key facts relating to colostrum:
• The calf’s intestine absorbs the large IgG molecules easily straight after birth
• The intestine’s ability to absorb antibodies decreases after birth—it decreases by 30–50 % within 6 hours of birth
• It stops completely between 24 to 36 hours after birth”
Yes, it’s vital to our calves.
We don’t sell a drop of the precious stuff (few farmers do, which is why it’s so expensive) and we’re not allowed to mix it with the rest of the milk because it goes off quickly. “Stealing colostrum from calves” is certainly not why we raise the calves away from the herd.