We can't use rats or mice or anything like that.

Studies of brain function, such as memory and social behavior, often use rats and birds.

This flight was followed by a series of subsequent flights using rats.

But in many cases, he said, "it would probably be better to use rats than dogs."

However, the same study in vivo using adult male rats showed no effects.

In a new project, she is using rats to study alcohol dependency.

But say you use brown rats from the sewers instead.

The brain stem's involvement of food intake has been researched using rats.

Some fictional works use rats as the main characters.

Similar results were reported by Neef and co-workers using rats.