New research has highlighted the importance of omega-3 fatty acids in promoting the longevity of dairy cows, revealing potential pathways for improving herd management through nutrition. This study, conducted by researcher David Sheedy as part of his PhD, will be presented at the Dairy Research Foundation Symposium in Wollongong on November 26-27, 2025.
As dairy cows age, they become more susceptible to reproductive and health problems, which can affect farm profitability. “With each additional lactation, the likelihood of reproductive and health issues increases,” Sheedy notes. Current management practices often lead farmers to sell cows earlier than optimal to mitigate these risks. His research suggests that addressing metabolic challenges associated with aging could allow producers to maintain more resilient herds.
Sheedy’s investigation focused on metabolic and fat markers linked to cow longevity, utilizing approximately 2,000 blood samples from 29 Australian dairy herds. The findings indicated a significant decline in blood levels of omega-3 fats as cows aged. “If we can boost omega-3 levels through supplementation and meaningfully improve survival, the potential gains for herd longevity are substantial,” he explains.
This research presents a promising avenue for enhancing cow health and productivity. The DairyUP team is currently exploring omega-3 supplementation strategies, particularly through marine-sourced products rich in these fatty acids. The aim is to evaluate the long-term effects of these supplements on cattle health, reproduction, and survival under Australian conditions.
The implications of this research extend beyond individual farms. By optimizing cow longevity through targeted nutritional strategies, the dairy industry could achieve greater flexibility and profitability. Improved herd health not only benefits producers but also contributes to the overall sustainability of dairy farming practices.
As this research continues to develop, the dairy sector may soon have new tools to enhance cow welfare and productivity, ultimately leading to a more robust and economically viable industry.
