Legacy-Built, Profit- Driven genetics for the Cattleman

We are an international coalition offering genetics from the real cattlemen of the world who understand that raising cattle is not meant to be a game.

We are here to help feed the world and make raising cattle profitable and sustainable.

Regenerative Agriculture with the Right Cattle

The principles of regenerative agriculture are crucial to the future of the agriculture industry, but success depends on cattle that can thrive within those principles. Our genetics are designed for cattle that work with nature, not against it—raising calves every year, maintaining condition on grass, and thriving with minimal inputs. If you're building a sustainable program, doesn't it make sense to start with cattle that are sustainable?

These consultants specialize in regenerative agriculture, combining expert pasture management with cattle genetics that thrive on grass and minimal inputs. They understand that sustainability and profitability go hand in hand when you work with nature, not against it.

Enrique Guerro

Jamie Elizondo

The Right Genetics For the Right Environment

Different environments require different genetics. We are here to work with breeders to try to find the genetics that are best suited for their ranch. Instead of fighting mother nature by changing your environment to fit your cattle, we understand that is more logical to find the genetics that are best suited to your environment.

When a cow is raising a healthy calf every year on hardly any inputs, she is telling you that she is the “right kind” of cow for you.

Herd Sires

Vintage (Deceased ) Sires

Donor Females

Learning from the Legends

To the true cattlemen of the world, Jon Bonsma, the founder of hormonal balance principles in cattle, and Tom Lasater, one of the greatest cattleman of all time, are legendary figures whose wisdom continues to guide sustainable breeding practices around the world.

Jan Bonsma

Tom Lasater

Learning from the Legacies

Our legacy breeders are sharing their time-honored practices and philosophies, creating an educational resource for cattlemen seeking sustainable, functional genetics.

Hayden Moore

Old School is the Right Way to Profitability

Just like older music often surpasses today’s trends, the same is true for cattle genetics. Our genetics reflect what Mother Nature intended: naturally fertile cattle that thrive on grass and excel in real-world conditions.

Many of our genetics trace back to the 1960s, when cattle were bred for practical performance. Today’s industry often pushes data and genetics that fail in the field, leaving ranchers struggling.

If universities, consultants, and associations truly promoted profitability, why does the average breeder last only 4–7 years? The disconnect lies in trusting theory over practice.

We preserve the legacy of traditional cattlemen, proving their way wasn’t just better—it was right. By prioritizing sustainability and real-world results, we’re bringing common sense back to the cattle industry.

Meet the Breeders

Sustainable Stock: Reviving Legacy Genetics

A podcast brought to you by Bos Sires

A true cattleman knows that a profitable cow raises a calf every year on minimal inputs, which is the definition of Sustainable Genetics.

By having cattle that eat less and thrive on grass-

  • Your feed costs drop drastically

  • You can run more cows per acre.

  • Your cattle maintain their body condition easier, which leads to higher fertility.

  • How much a cow consumes is highly heritable.

    (Average Daily DMI is 84% heritable in heifers)

  • Which all leads to actual or more profit.

Join the Movement

Bos Sires is more than just a genetics company—it’s a movement. Whether you're a breeder looking to share your genetics, a consultant with expertise to share, a representative eager to expand our reach, or a distributor wanting to bring real-world solutions to your region, there’s a place for you. We welcome anyone who believes in breeding cattle the right way. Get involved and help reshape the future of the industry.