Dairy cattle have to grow up just like people do. A dairy cow doesn't produce milk until she has a calf. She is about two years old when she has her first calf. Dairy farmers like the cows to have a calf every 12 to 14 months. The pictures below show dairy animals from a baby calf to an adult cow.

The average Holstein calf weighs from 90 to 100 pounds at birth. A newborn calf is fed colostrum milk for the first three days of life. Colostrum is special because it gives the calf extra nutrients to help the calf get off to a good, healthy start. Calves are usually fed milk or milk replacer starting at 3 days of age. They are also fed calf starter, a grain, beginning at 7 to 10 days of age. They are 4 to 8 weeks old when they are weaned from milk.........Read More

Source: 4H Virtual Farm