A cow gives birth 285 days after she becomes pregnant. When a calf is born, it weighs about 60 to 100 pounds. Over the next few months each calf will live off its mother’s milk and graze on grass pastures.
Calves will stay with their dams (mothers) for 6-9 months. During this time, their primary source of food is milk from their dam, and the grass or roughage (hay) that is available. At 6-9 months of age the calves are
weaned off their dams and placed in a field with other calves of a similar age and weight. Most calves will weigh 500-700 lbs at weaning.
These twin calves in these photos show them at two days old (above) and at two months old, so they still have a few more months with mom before being weaned.