Low-Fat Wet Distillers Grains (WDG) for Dairy & Beef Cattle

Low-Fat WDG are a cost-competitive alternative to traditional protein sources such as soybean meal and canola meal. Often, they are priced favorably on a per-unit-of-protein basis and can reduce the overall cost of the ration without compromising performance. In addition, they contribute fermentable fiber and residual energy—despite the lower fat content—which can help partially replace starch from cereal grains like corn. This can be especially advantageous in managing ration costs and mitigating the effects of high corn prices.

Low-Fat Wet Distillers Grains are an excellent source of protein, digestible fiber and essential minerals. With the fat content reduced—typically to 3–6%, Low-Fat WDG help to manage dietary energy levels more precisely, reducing the risk of overfeeding fat and helping support better rumen function.

One of the standout attributes of Low-Fat WDG is their high neutral detergent fiber digestibility (NDFd). The fiber in Wet Distillers Grains is more fermentable than that in traditional forages, which contributes to improved rumen fermentation, greater dry matter intake (DMI), and better feed efficiency. This makes Low-Fat WDG a particularly valuable complement to forage-based diets, especially when forage quality or availability is limited.

Due to their moist nature—typically ~70% moisture—Low-Fat WDG help reduce sorting behaviour in total mixed rations (TMRs), ensuring more consistent intake and nutrient delivery across the herd. Their palatability often results in better acceptance of the TMR, even among higher-producing cows. The moisture also helps bind drier ingredients together, reducing ration dust and improving bunk management.

Utilizing Low-Fat WDG as a feedstuff aligns with the principles of circular agriculture. By feeding this co-product, dairy farms help divert materials from waste streams and reduce reliance on primary feed crops, which in turn lessens the environmental footprint associated with feed production. Additionally, reducing dietary fat through Low-Fat WDG can decrease enteric methane emissions, contributing to improved environmental performance at the farm level.

With proper formulation and inclusion rates—typically between 5–20% of the ration dry matter—Low-Fat WDG can support high milk yields and excellent body condition without negatively impacting reproductive performance. They provide a steady supply of protein and energy, promoting lactation persistence and helping cows transition smoothly through different production stages.

Low-fat wet distillers grains offer a practical, nutritionally valuable, and sustainable solution for dairy rations. Their inclusion helps farmers balance cost, performance, and environmental impact—making them a smart choice in today’s competitive dairy landscape. As always, incorporating Low-Fat WDG should be done in consultation with a qualified nutritionist to ensure the ration is well-balanced and optimized for the specific needs of the herd.