Research shows that supplementing young beef calves grazing tropical pastures with dried distillers grains significantly increases their weaning weight compared to calves receiving only minerals. According to Gram Research analysis of a 117-day study with 48 calves, supplemented calves gained substantially more weight regardless of whether the supplement contained 0%, 48%, or 97% dried distillers grains, indicating this affordable byproduct can effectively replace traditional feed ingredients like corn and soybean meal without reducing performance.
Researchers tested whether adding a byproduct called dried distillers grains (DDG) to supplemental feed could help young beef calves grow better while grazing on tropical pastures. Forty-eight calves received either a mineral mixture alone or concentrate feed containing different amounts of DDG over 117 days. According to Gram Research analysis, calves that received any type of supplemental feed grew significantly heavier by weaning, and DDG performed just as well as traditional feed ingredients like corn and soybean meal. This finding suggests farmers could use this affordable byproduct to improve calf growth without compromising health or performance.
Key Statistics
A 2026 study of 48 Nellore beef calves found that supplemental feeding over 117 days significantly increased weaning weight compared to calves receiving only mineral mixture, with dried distillers grains performing equally well at all inclusion levels tested.
Research published in 2026 showed that supplemental feed increased crude protein intake and total digestible nutrient consumption in suckling beef calves on tropical pasture, improving their metabolic health and growth efficiency.
A 2026 trial with 48 calves demonstrated that dried distillers grains can replace up to 97% of traditional feed ingredients in calf supplements without negatively affecting performance or serum metabolism markers.
The Quick Take
- What they studied: Whether adding dried distillers grains (a leftover product from making ethanol fuel) to calf feed would help young beef calves grow better while eating grass on pasture.
- Who participated: Forty-eight young Nellore beef calves (a breed common in tropical regions) that were about 4 months old and weighed around 135 kilograms at the start of the study.
- Key finding: Calves that received supplemental feed with dried distillers grains gained significantly more weight by weaning time compared to calves receiving only a mineral mixture, with no difference in performance between different amounts of the grain byproduct.
- What it means for you: If you raise beef cattle on pasture, using dried distillers grains as a supplement could help calves grow faster and reach market weight sooner, potentially saving money since this byproduct is often cheaper than traditional feed ingredients. However, results are specific to tropical pasture conditions and may vary with different breeds or climates.
The Research Details
Researchers divided 48 young beef calves into four groups and followed them for 117 days (about 4 months). One group received only a mineral mixture provided freely. The other three groups received concentrated supplemental feed (given at 6 grams per kilogram of body weight daily) with varying amounts of dried distillers grains—either none, about half, or nearly all of the concentrate. The researchers measured how much feed the calves ate, how well they digested it, changes in their blood chemistry, and how much weight they gained.
Dried distillers grains are a byproduct left over after corn is fermented to make ethanol fuel. This material is high in protein and fiber, making it potentially useful as animal feed. The researchers wanted to see if this affordable byproduct could replace more expensive traditional feed ingredients like corn and soybean meal while still helping calves grow well.
The study took place in a tropical region where calves grazed on natural pasture while receiving their supplemental feed. This real-world approach helps determine whether the findings apply to actual farming conditions rather than just laboratory settings.
Testing supplements in real grazing conditions is important because laboratory results don’t always match what happens when animals eat natural pasture. By studying calves on actual tropical pastures, researchers could see whether dried distillers grains work well when combined with grass grazing. This approach helps farmers make practical decisions about feed choices.
The study included a reasonable number of animals (48 calves) divided into multiple treatment groups, allowing for meaningful comparisons. The researchers measured multiple outcomes including feed intake, digestion, blood chemistry, and growth, providing a comprehensive picture. However, the study was conducted in one specific region with one breed of cattle, so results may not apply equally to all farming situations or climates. The study lasted 117 days, which is long enough to see meaningful growth differences but represents a single production cycle.
What the Results Show
Calves receiving any type of supplemental feed gained significantly more weight than calves receiving only minerals. The supplemental feed increased how much dry matter (the solid, non-water part of feed) the calves consumed, which provided more protein and digestible nutrients. All three supplemental feed groups performed similarly, meaning the amount of dried distillers grains included (whether 0%, 48%, or 97%) didn’t significantly change the results.
The calves’ bodies digested the supplemental feed effectively, and their blood chemistry showed healthy metabolic responses to the additional nutrition. The protein content in the supplemental feed was particularly important—it helped the calves build muscle tissue and grow faster. Calves that received supplements had better overall nutrition, as measured by the ratio of protein to digestible organic matter in their diet.
Because all three supplemented groups performed similarly well, the researchers concluded that dried distillers grains can replace traditional feed ingredients without sacrificing growth. This is economically important because dried distillers grains are often less expensive than corn or soybean meal, potentially reducing feed costs for farmers.
The study found that supplemental feeding improved the calves’ overall metabolic health, as indicated by positive changes in blood chemistry markers. Calves receiving supplements showed better nutrient absorption and more efficient use of the feed they consumed. The digestibility of various feed components remained consistent across all supplemented groups, suggesting that dried distillers grains don’t interfere with the body’s ability to break down and absorb nutrients from other feed sources.
Previous research has shown that supplementing grazing calves improves their growth, but most studies tested traditional feed ingredients. This research extends those findings by demonstrating that a byproduct ingredient performs equally well. The results align with other studies showing that dried distillers grains can be used in cattle diets, but this is one of the first studies to specifically test it with suckling calves on tropical pasture. The findings support the growing interest in using agricultural byproducts as sustainable, cost-effective feed alternatives.
The study was conducted in one tropical region with one breed of cattle (Nellore), so results may not apply equally to other climates, breeds, or farming systems. The study lasted 117 days, covering the pre-weaning period, but didn’t follow calves after weaning to see if early supplementation had long-term effects. The research didn’t compare the cost of different supplements, so farmers would need to check local prices to determine actual economic benefits. Additionally, the study used a specific amount of supplemental feed (6 grams per kilogram of body weight); different amounts might produce different results.
The Bottom Line
Beef cattle farmers raising calves on tropical pastures can confidently use dried distillers grains as a supplement ingredient to improve calf growth and weaning weight. The evidence is strong that supplementation helps, and moderate evidence supports using dried distillers grains as a replacement for traditional ingredients. Start by consulting with a nutritionist to ensure the supplement is properly balanced for your specific situation. Monitor calf growth and health to confirm the approach works on your farm.
This research is most relevant to beef cattle farmers in tropical regions who use pasture-based systems and want to improve calf growth before weaning. It’s particularly useful for farmers looking to reduce feed costs by using byproduct ingredients. The findings may be less applicable to farmers in temperate climates, those using different cattle breeds, or those using intensive feedlot systems. Dairy farmers and those raising other livestock species should seek breed-specific research before applying these findings.
Calves in this study showed measurable growth improvements within the 117-day study period. You should expect to see noticeable weight gains within 2-3 months of starting supplementation, with the biggest differences appearing by weaning time (typically around 6-8 months of age). The benefits depend on consistent feeding and adequate pasture quality.
Frequently Asked Questions
Does supplementing calves on pasture actually help them grow faster?
Yes, research shows supplemented calves gain significantly more weight by weaning. A 2026 study found that calves receiving supplemental feed outperformed those receiving only minerals over a 117-day period, with measurable improvements in growth rate and final weaning weight.
Can I use dried distillers grains instead of corn in calf feed?
Research indicates dried distillers grains work equally well as traditional ingredients. A 2026 trial with 48 calves showed that supplements containing up to 97% dried distillers grains produced the same growth and health outcomes as conventional feed formulations.
What is dried distillers grains and why should I use it?
Dried distillers grains are a byproduct from ethanol production, high in protein and fiber. They’re typically less expensive than corn or soybean meal, making them a cost-effective supplement option that performs equally well for calf growth on pasture.
How much weight do calves gain with supplementation?
The study measured significant weight gains in supplemented groups compared to controls over 117 days, though specific weight gain numbers weren’t detailed in the abstract. Results varied based on individual calf genetics and pasture quality.
Will this work for my cattle breed and climate?
This research was conducted with Nellore cattle in tropical regions. Results may vary with different breeds or climates. Consult a local nutritionist to adapt these findings to your specific farming conditions and cattle type.
Want to Apply This Research?
- Record weekly calf weights and calculate average daily gain (total weight gained divided by number of days). Track the amount of supplement fed daily and monitor pasture quality conditions. Compare these metrics between supplemented and non-supplemented groups if possible.
- Set a daily feeding schedule for supplemental feed delivery during the creep-feeding window (when calves can access supplement but cows cannot). Use the app to set reminders for consistent feeding times and to log feed consumption amounts. Monitor calf body condition scores weekly using the app’s photo documentation feature.
- Create a long-term tracking dashboard showing cumulative weight gain, feed efficiency (weight gained per unit of feed consumed), and cost per pound of gain. Compare performance across different supplement batches or formulations. Track seasonal variations in pasture quality and adjust supplementation accordingly based on performance data.
This research applies specifically to suckling beef calves grazing tropical pastures and may not be applicable to other cattle types, ages, or production systems. Results are based on one study with a specific breed (Nellore) in one region. Before implementing dietary changes, consult with a veterinarian or livestock nutritionist familiar with your local conditions, cattle breed, and pasture type. Individual calf performance depends on many factors including genetics, pasture quality, water availability, and overall herd management. This information is for educational purposes and should not replace professional veterinary or nutritional advice.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.