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“A working cow just the way I like them.” With these words, Koen Nooijen describes Delta Margit. “She is beautifully built, strong, and has a long body, with a broad, well-shaped rump, an excellent functional udder, and great legs,” says the Dutch dairy farmer from Coevorden about the dam of Delta Boulevard, that scored 85 points at classification.

The Boreso son Delta Amsterdam RC passes on over 1,100 kg of milk with +0.19% protein and €369 Inet. The FeedExcel bull combines this with a feed efficiency score of 107. This means his daughters will produce 3.5% more milk per kilogram of dry matter than daughters of an average bull. They also produce persistently (109) and mature later (106). Additionally, Amsterdam RC shows a complete conformation profile with a flawless rump and scores of 106 for udder, 105 for legs, and 107 for overall conformation in the top line. Above all, Amsterdam RC excels in health and fertility, with 107 for udder health, 110 for claw health, and 105 for fertility, resulting in +8% CRV Health. For example, Amsterdam daughters will have 8 percentage points fewer claw problems than daughters of an average bull and about 5 percentage points less subclinical mastitis. His fertility breeding values indicate an eight-day shorter interval between first and last insemination and a 3-percentage-point higher non-return rate.

The famous English biologist Charles Darwin introduced his theory about the ‘survival of the fittest’ in 1859. Loosely translated: the best animal adapted to its environment has the greatest chance of surviving and reproducing. Darwin’s theory still applies in 2025, although progress in 21st-century cattle breeding thankfully moves much faster. The numbers of the new InSire bull Delta Fitter PP speak for themselves. His daughters are expected to live about a year and a half longer than average and achieve an extra lifetime production of over 20,000 kg of milk. They are, in short, excellently adapted to the demands of today.

Delta Dewy P is distantly related to the renowned American dam Markwell Blackstar Raven. The red-and-white dam of Chiptuner and Steadfast P is a heifer the Dutch dairy farmer Arjan van Erp likes - flawless and strong, yet also attractive and dairy-typical. She produces 4 percent protein.

In August, CRV's Holstein bulls received their first Methane Saved breeding value. This is now also available in the online catalogue.

Just as the Eurostar train transports passengers at high speed, Delta Eurostar rapidly delivers cows that perform at the highest level. This new InSire sire transmits high milk production (+1,152 kg) with strong components (+0.41% fat and +0.20% protein), resulting in +156 kg fat and protein and €549 Inet. He also adds +591 days of longevity. This means his daughters will remain productive for an average of ten months longer, yielding over 10,000 kg of additional milk throughout their lifetime. Eurostar also achieves an impressive +19% CRV Efficiency score.