Overview of Fat Digestion and Metabolism in Dairy Cows

Over the last 25 years, the use of supplemental fats and oils in dairy cow rations has developed to the point where it now is a standard practice. Fats are supplemented to increase ration energy density, which ideally will lead to increased energy intake if dry matter intake is not decreased extensively. In turn, increased energy intake should improve energy balance and benefit body condition, milk production, and reproduction. However, there still is much confusion over different types of fats, how much can or should be fed, and what types of responses to expect. Considerable misinformation also has been spread by various parties, which further complicates the job of those formulating rations for dairy producers.