05/01/2026
🐮 Colostrum: the most important feed a calf will ever have!
A calf is born with no protective antibodies of its own. The only way it can fight disease in the first weeks of life is by absorbing antibodies from colostrum — and this can only happen in the first few hours after birth.
🔑 The 3 golden rules of colostrum: Quality, Quantity & Quick
1️⃣ Quality
Good colostrum should be:
• From a healthy, well-vaccinated cow
• Ideally tested with a Brix refractometer (target ≥22% Brix)
Poor-quality colostrum = poor immunity, even if the calf drinks plenty.
2️⃣ Quantity
A newborn calf needs:
• 10% of bodyweight in the first feed
• Typically 3–4 litres for a Holstein calf
• Equivalent to 20 minutes non-stop drinking for a suckler calf
If a calf won’t suck strongly, stomach tubing early is far better than waiting.
3️⃣ Quick
Timing is critical:
• First feed ideally within 2 hours of birth
• Antibody absorption drops rapidly after this
• By 24 hours, absorption is almost zero
Delays mean wasted colostrum and vulnerable calves.
🧼 Don’t forget hygiene
Dirty teats, buckets, or tubes can undo all your hard work by introducing bacteria, which reduce antibody absorption and increase scour risk.
❄️ Storage tips
• Fresh colostrum: use within 24 hours (refrigerated)
• Frozen colostrum: freeze quickly, label clearly, and thaw gently (never microwave)
📉 What happens when colostrum management slips?
• Higher scour and pneumonia rates
• Poor growth rates
• Increased medicine use
• Lower lifetime performance
Good colostrum management isn’t just about calf survival — it’s about future yield, fertility, and longevity.
If you’d like help testing colostrum quality, reviewing protocols, or training staff, speak to your farm vet — small changes here can make a big difference. Being a member of our youngstock club means we can continuously monitor your calves immunity throughout the year.