Cows are mainly farmed for their milk, which is taken from the farm by refrigerated tankers and brought to a factory. There, the milk is pasteurized by heating it to 71 degrees Celsius for 15 seconds to kill bacteria before being bottled or packaged for sale. Dairy cows need to have a calf each year to produce milk for human consumption. The calves are either raised as future dairy cows or for beef production.

1. How We Get Milk By Dominic, Jessica, Holly, Lucy, Thomas, Zoe and Marcus

2. Fact Milk is very good for your bones and teeth. Most milk comes from cows, but you can also get it from goats or sheep. Dairy cows are mainly farmed for milk. Where Milk comes from

3. A cow has to have a calf before it can produce milk. Dairy cows have a calf every year.

6. Milk Tankers The milk is taken from the farm by a refrigerated tanker to a factory to be pasteurised and bottled.