1.   One hundred and eighty rats were included in this study.

2.   Here, it is five to a bed, not including rats.

3.   Snyder did not include female rats in the study to see if a similar reaction occurred.

4.   They include a rat named Templeton and a dachshund named Gloria.

5.   They feed on a variety of vertebrates, including rats, ducks, chickens, porcupines, pigs and monkeys.

6.   Responding to a lawsuit by animal rights activists, the Agriculture Department has agreed to expand its regulation of research animals to include rats, mice and birds.