Cow is another name for cattle.  The first cow in America arrived in
Jamestown  colony in 1611. Until the 1850's, nearly every family had its own
cow.  The average cow is 2 years old when she has her first  calf.
Calves are fed milk until they are 8-9 weeks old.  A young female cow is called a heifer.
Dairy cows provide 90% of the world's milk supply.Cows drink about a bathtub full of water and eat around 40 pounds of food a day.Cows have 32 teeth.

thanks to:http://www.aipl.arsusda.gov/kc/cowfacts.html