Sandrine Barack - #1 French-Belgian Blue Crossbreed Bull! Sandrine Barack has been a very popular Bull since the start of Sandrine Genetics. It immediately appealed to farmers and inseminators because of its excellent fertilization! Since Sandrine Barack is a very good sperm producer, he could be used extensively nationwide. From the moment the first calves were born until today, the demand for Sandrine Barack has been huge. As a result, Sandrine Barack has been one of the Top 5 most used French-Belgian blue bulls for 5 years now. In the meantime, no fewer than 105,292 births have been registered! Last AI year, Sandrine Barack is the #3 most used sire across all breeds (including HF). In short, why is Sandrine Barack so popular? Sandrine Barack is unique because of its excellent fertilization. Sandrine Barack scored 12% less difficult births with 129 birth ease. Sandrine Barack scores 89 gestations. Livestock farmers welcome cows that carry on for a long time, meaning more milk in the tank! Sandrine Barack always ensures a best calf price (for both bull and heifer calves) due to enormous growth in the first 21 days!