Most Hereford calves have a dark red coat. Their face, chest, neck and belly are white. The calves process the food they eat extremely efficiently, which allows them to put on several hundred kilograms in their first two years. A fully grown cow weighs 600 to 800kg, while a fully grown bull weighs 900 to 1,350kg. Fun fact A Hereford calf weighs around 40kg at birth. Suitable from 3 yrs+