Feed or dairy efficiency reflects the level of fat-corrected milk yield produced per unit of dry matter consumed with an optimal range of 1.4 to 1.9 pounds of milk per pound of dry matter. • Days in milk, age, growth, changes in body condition score, walking distances, body weight, forage quality, feed additives, and environmental factors will impact feed efficiency values. • Dairy managers
... [Show full abstract] should monitor changes in feed efficiency as feeding and management changes occur on their farms to evaluate the impact of the change. • The availability of computer-based corrected values will allow for accurate comparisons between groups, herds, and feeding/manage-ment changes. Feed efficiency (also referred to as dairy effi-ciency) can be defined as pounds of milk produced per pound of dry matter (DM) consumed. Beef, swine, fish, and poultry industries have used feed efficiency (feed to gain ratio) as a benchmark for profitability. Monitoring feed efficiency or FE in the dairy industry has not been used as a common benchmark for monitoring profitability and evaluating dry matter intake relative to milk yield. The "new focus" on maximizing efficiency reflects as cows consume more feed, digestive efficiency decreases as the relationship between net energy-lactation intake and milk production is subject to diminishing returns. The "traditional focus" was that as cows consume more feed to support higher milk production, the proportion of digested nutrients captured as milk is proportionally higher.