Rumensin® for Beef Cattle

For over 45 years, producers have trusted Rumensin to deliver consistent, dependable results. The findings from more than 400 Elanco research studies have made it possible for producers to include Rumensin in ever-changing feed programs and management systems—providing versatile solutions for healthy, productive cattle and sustained success.

Trusted by Generations of Beef Producers


Successful beef operations don't just happen overnight. Meet some of the producers who are creating a legacy they're proud to be remembered by.

Kendall, Director of Nutrition, Cactus Feeders; Amarillo, Texas

“I’ve been in the feedlot business most of my life, starting when I was a boy. My dad was a nutritionist, so I got to travel with him visiting feedlots. And now I’m able to produce wholesome food for families.”

Randy, General Manager, Wrangler Feedyard; Amarillo, Texas

“I grew up raising cattle on feedlots, and that’s what I’ve been doing here for 20 years. It all comes down to trust and integrity, and I’m proud to say that a lot of our business is still done with a handshake.”


Cow-calf producers rely on Rumensin to improve feed efficiency, increase gain and/or prevent and control coccidiosis. Here are just a few of the people who are working to build their legacies.

Ron, Owner, Manning Cattle Company; Macy, Indiana

“One of the things I’ve tried to pass on to my son and grandson is that it’s hard to get started. We started with virtually nothing. If there’s one thing they need to do, it’s to keep the land intact.”

Ethan, Manning Cattle Company; Macy, Indiana

“My father and grandfather are the hardest-working people I know — having full-time jobs and then building this operation, building a family and being involved in the community. Hard work is something I’ve learned from them.”


Rumensin improves feed efficiency and prevents and controls coccidiosis in feedlot cattle.

Beef Cattle Stocker


Rumensin increases average daily gain as well as prevents and controls coccidiosis in stocker cattle.


Cows consuming Rumensin maintain body weight on less feed resulting in an improvement in feed efficiency and prevents and controls coccidiosis.

The label contains complete use information, including cautions and warnings. Always read, understand and follow the label and use directions.

CAUTION: Consumption by unapproved species or feeding undiluted may be toxic or fatal. Do not feed to veal calves.

Rumensin, Elanco and the diagonal bar logo are trademarks of Elanco or its affiliates.