Actually they are (within a matter of hours) and the bulk of colostrum a calf gets in its first days comes in frozen form, from other cows. If a calf is allowe

Actually they are (within a matter of hours) and the bulk of colostrum a calf gets in its first days comes in frozen form, from other cows. If a calf is allowed to suckle as nature intended it will learn to like the process (and the milk) and take longer to get onto a dry feed diet. In a commercial operation there's no time for that. Source: 3 years on a dairy farm.