A young cow is called a heifer while a baby cow is called a calf. While a cow is female cattle, both baby male and female cattle are called calves.
A cow is a fully grown female cattle while a fully grown male cattle is called a bull or steer, depending on if it has been castrated. Cows are animals that are both eaten in the form of various beef products by humans and provide milk. Cow milk is used for a variety of food products, including multiple forms of milk, cheese and yogurt.
Cows typically only eat grass for food, unless there is none available. They will eat for up to 6 hours each day.