Cattle are ruminants, meaning that they have a digestive system that allows them to utilize otherwise undigestible foods by repeatedly regurgitating and rechewing them as "cud." The cud is then reswallowed and further digested by specialized microorganisms that live in the rumen. The calf nipple we offer allows baby calves to get the nutrition that they need when not receiving it from the mother. The gestation period for a cow is nine months. A newborn calf weighs approximately 35-45kg. Cows can live up to be 25 years, so our calf bottle and nipple helps maximize your profit from your herd. Our replacement calf nipples for our calf bottle are made from special rubber formula to prolong life and improve pliability. These come in one each as replacement nipples for the plastic calf bottles.