Simmental CalfSchleich 13802 Simmental Calf. Cows and their calves have an extremely deep, life long bond. They lick and nibble at each other. If they are separated, they can recognise each other later on from their voice and scent. Fun Fact: When calves play, they run around, buck up or gently ram each other's heads. Calves are born around once a year. It's very important they drink their mother's milk within the first few hours. This is a special yellowish liquid