A worker moves the mare's milk bottles in a tank prior to pasteurisation at the Chevalait farm in Chailloue, northwestern France, on November 18, 2020. - Chevalait is one of the biggest mare's milk farm in France and Europe. They produce fresh milk, growing-up milk, cosmetics products and other products from mare's milk. They hope scientific studies on mare's milk used as infant formula could open them this market shortly. (Photo by LOU BENOIST / AFP)