Older dairy cows boost milk output 3,000kg - Canadian data

Canadian dairy data reveals peak production timing

New research from Lactanet shows Canadian dairy cows hit their production sweet spot much later than many farmers expect. Cows in their third lactation or beyond produce approximately 3,000 kilograms more milk than first-lactation animals, according to data mining from top-management dairies across the country.

This finding challenges the common practice of culling older cows too early. Jeremy Ten Hag, Lactanet's senior product specialist, calls the numbers "extremely significant" - and for good reason. That extra 3,000 kilograms per cow translates to substantial revenue differences that could reshape how Canadian dairy producers think about herd longevity.

The data comes from analyzing high-performing dairy operations, meaning these aren't just average results - they represent what's possible with proper management practices.

What this means for your operation

This research should make you reconsider your culling decisions. Many producers focus heavily on bringing in fresh heifers, but this data suggests keeping productive older cows longer could boost your bottom line significantly.

Before you change course completely, evaluate your current herd management. The dairies in this study represent top-tier operations with excellent nutrition, health protocols, and facilities. If your management isn't at that level, older cows might not deliver the same performance gains.

Consider tracking individual cow performance more closely rather than making blanket decisions based on lactation number. Some cows will peak early and decline, while others will follow this pattern of increasing production. Your records should guide these choices, not just age or lactation count.

Key numbers

• Third-lactation and older cows produce 3,000kg more milk than first-lactation animals
• Data represents top-management dairy operations across Canada
• Production peaks occur in third lactation or later, not in first or second lactations
• Results come from comprehensive Lactanet database analysis
• Study focused on high-performing herds with superior management practices

What to watch next

Lactanet plans to release more detailed breakdowns of this data, including specific lactation curves and management factors that contribute to extended productive life. Watch for additional research on optimal culling strategies and economic analysis of keeping cows longer versus replacement costs.

The organization typically releases comprehensive reports quarterly, so expect more actionable data by summer that could help refine your herd management decisions.