The extra energy a dairy farm needs.
Why is extra energy important?
Approved for use in lactating dairy cows
Rumensin gives cows a boost of extra energy* that can increase their milk production efficiency.1† Rumensin is the only FDA-approved feed ingredient for lactating and dry cows that increases milk production efficiency† by delivering more milk per pound of feed while maintaining milk’s natural wholesomeness.
Cows have different needs at different stages. Early lactation cows crave additional energy to support higher production. Late lactation counterparts need less feed to maintain production and pregnancies. Regardless of the feedstuffs for lactating and dry cows, Rumensin helps cows get more energy from every pound of feed.
Approved for use in calves and heifers
Rumensin helps prevent and control coccidiosis in calves and heifers, and promotes increased heifer weight gain during all stages of post-weaning development. It meets the US Food and Drug Administration’s stringent standards for efficacy and safety. On average, provides a 7:1 return on investment in calves and heifers.2
Lactating Dairy Cows
Rumensin means greater milk production efficiency2*—up to 4% more energy per pound of feed, for a return on investment of at least 5:1.3 Rumensin’s ability to help cows get more energy from every pound of feed provides flexibility when formulating rations. Dairy producers can customize the herd’s ration and get more milk from the same feed or the same milk from less feed. By increasing milk production efficiency,† Rumensin helps provide value throughout the lactation cycle:
- During transition and early lactation
◦ More energy from every pound of feed
◦ No change in dry matter intake (DMI) while cows are in negative energy balance
- Mid-lactation and late lactation
◦ More milk per pound of feed
◦ Once energy balance is achieved, DMI may decrease
- During the dry period
◦ More efficient use of feed to maintain body condition
Safely and effectively produce more milk per pound of feed
Because feedstuffs and management goals are unique to each dairy, it’s important to work with your nutritionist to optimize Rumensin to get the most out of your feed. Nutrition experts can help translate the sound science behind Rumensin into real-world results for you.
Common benefits of Rumensin include:
- 5:1 average return on your investment3
- More milk per pound of feed (for just pennies per head per day)4
- Increased milk production efficiency† throughout lactation and the dry period
- Meets the US FDA’s stringent standards for effectiveness and animal, environmental, and human-food safety
Calves and Heifers
Rumensin is approved for increased rate of weight gain and for the prevention and control of coccidiosis due to the protozoan parasites Eimeria bovis and Eimeria zuernii in dairy replacement heifers. Rumensin contributes to the growth and health of heifers through two mechanisms:
- Improving rumen fermentation5
- Killing coccidia in the small and large intestines5
In the rumen, Rumensin alters the microbial population, resulting in greater production of propionic acid. Production of propionic acid allows the calf to capture more energy from the ration and serves as the major substrate for glucose synthesis in the liver,6 increasing rate of weight gain in growing cattle and improving milk production efficiency† in lactating and dry cows.
Rumensin prevents and controls coccidiosis. Some other products used to control coccidiosis simply interrupt the coccidiosis growth cycle. They prevent further growth as long as the drug is present in adequate levels. When these products are removed from the feed, growth of the coccidiosis parasites resumes and can lead to coccidiosis breaks. Those compounds are referred to as “static” products, in contrast to Rumensin which renders a “cidal” or killing effect. The best way to get solid control of coccidia is to feed Rumensin right from the start. When calves are first born, their starter feed should contain Rumensin at a level ranging from 30 to 60 g/ton. Research has shown that feed intake is maintained at these concentrations of Rumensin in the starter feed.7 By including Rumensin in the starter feed, the coccidia have the opportunity to be killed in a timely manner following ingestion. Good control from the beginning increases the ability of calves to maintain a desired growth rate and avoid breaks associated with changing environment and diets at transition.
Feed companies that supply quality feed products to the cattle industry have utilized Elanco's Rumensin as an integral component of their feeding programs. To assist feed manufacturers in providing a quality feed product to their customers, Elanco has added Microtracers® to Rumensin. Microtracers can provide a quick method for confirmation of inclusion or absence of Rumensin in the feed.
Microtracers are extremely small, stainless steel particles with a unique color coating, which do not impact the feed, animal, or environment when Rumensin is used. With the addition of Microtracers in Rumensin, samples of premix or supplements can be tested for the presence of Rumensin in less than 3 minutes.
Elanco provides two Rumensin Microtracers detection kits: the mason jar and the rotary detector.
Rumensin is approved for use in dairy cows in more than 20 countries around the world. Extensive research associated with these approvals shows that the natural wholesomeness and quality of milk from Rumensin-fed cows are maintained throughout lactation. In addition, the FDA has determined that both milk and meat from cows fed Rumensin are safe for human consumption. That’s why no withdrawal is required when feeding Rumensin to dairy cows, heifers or calves.