"According to the Food Safety Inspection Service (FSIS) of the United States Department of Agriculture, 6.2 million cows, 12.4 million female calves, and 1.3 million male calves were slaughtered in 2001."

and another bit of info:

"Record numbers of chickens and turkeys are being raised and killed for meat in the U.S. every year. Nearly ten billion chickens, and half a billion turkeys, are being hatched in the U.S. every year. These birds are typically crowded by the thousand into huge factory- like warehouses where they can barely move. Chickens are given less than half a square foot of space per bird while turkeys are each given less than three square feet."

The second quote from here.

FYI