Volume IV Number 19 . . . . Review by Luella Sumner. A small herd has about ten cows. A large herd can have hundreds. Male cows are called bulls.
Most herds have one bull and many females.
Only females can make milk. They make it to feed their babies, which are called calves. Cows make more milk than their calves need. Dairy farmers collect this extra milk and sell it. Most people simply call all types of cows 'cows'.