1.   Still, this is the first time federal officials have learned that cows in the United States were given feed made through unsafe practices.

2.   The researchers also showed that when American chickens are given feed that contains fish meal or flax, they produce eggs with higher amounts of these healthful fatty acids.

3.   Scientists believe it originated in Britain when cattle were given feed containing the ground remains of sheep infected with a brain ailment.

4.   Scientists believe mad cow disease originated in Britain, when cattle were given feed containing the ground remains of sheep infected with a brain ailment.

5.   Scientists believe mad cow disease originated in Britain when cattle were given feed containing the ground remains of sheep infected with a brain ailment.

6.   U.S. law forbids giving cattle feed that includes body parts or bone meal.

7.   The study presumed that once steps had been taken to ensure cattle could not be given feed contaminated with the BSE agent, the disease would die out.