Black Angus calf A Black Angus calf drinks its mothers milk for the first six to eight months. A Black Angus calf drinks its mothers milk for the first six to eight months. The cattle of this breed grow very fast an eight-month-old calf can weigh 160-180 kg. Originally the animals come from Scotland, where the weather can be very cold and wet. The animals are therefore very robust. Fun fact Black Angus calves weigh 30-35 kg at birth. Dimensions : 8.0 x 3.10 x 5.60 cm (W x D x H)