OptiFeed- Bred for Optimum Efficiency

Trouble free cows that convert feed into milk at high levels are profitable cows. With rising feed costs, dairy farmers around the world are looking for ways to improve efficiency to increase profitability. Breeding for optimum efficiency is the primary objective of OptiFeed. By using OptiFeed Bulls, dairymen can breed cows that will increase their farms profitability.

RoboMaxx- Robotmilker Ready

RoboMaxx identifies bulls that specialize in producing daughters who perform well with minimal management and Robot Milkers. RoboMaxx focuses on sires that transmit high milk, fat and protein production, correct teat placement with adequate teat length, excellent feet and legs, and low somatic cell scores. By using these sires you can create the next generation of profitable cows for your specific milking system.

GForce Sires

Indicates a bull whose genetic evaluation is based on a combination of traditional pedigree data and genomic data but does not yet contain actual daughter data. This increases the reliability and accuracy of young sire’s genetic potential prior to the availability of actual daughter data.

Fertility +

While the greatest variables affecting pregnancy rates are accuracy of heat detection, inseminator technique and other management factors, looking at all available fertility values of individual sires can help. Through evaluation of the Composite Fertility Index (CFI) and Sire Conception Rate (SCR), along with intense semen quality evaluations, these elite sires earn the designation of Fertility +.

GForce Plus Sires

GForce Bulls with positive sire conception rates and actual calving ease observations.

Calving Ease Sires

Indicates a sire that is predicted to sire calves that are born more easily than the breed average.


Indicates Wellness Trait Index™ (WT$™) sires. WT$ focuses exclusively on six wellness traits (mastitis, lameness, metritis, retained placenta, displaced abomasum and ketosis) and includes an economic value for Polled.


PROFIT$ highlights total-profit sires with an emphasis on semen fertility. The highest ranked DWP$™ sires will receive the PROFIT$ designation to identify the bulls that are most likely to sire productive, trouble-free, long-lived cows. Negative SCR bulls are excluded from this designation to focus on bulls most likely to create a pregnancy.

Elite Sexed Fertility

Select Sires continues to innovate the use of data to benefit customer-owners as the first A.I. organization to identify our highest performing sires for sex-sorted semen in both 2M and 4M products. The addition of the Elite Sexed Fertility designation provides a useful new tool to help you maximize success with gender SELECTed SexedULTRA semen.  More...


NxGEN® is a membership program used to expedite the distribution of elite genetics from the World Wide Sires/Select Sires breeding program into the marketplace. NxGEN has been developed to continue protecting World Wide Sires/Select Sires’ ongoing investments for the long-term benefit of our member patrons.   More...