"Willard" - 1971

A social misfit uses his only friends, his pet rats, to exact revenge on his tormentors.

Willard is a 1971 American horror film directed by Daniel Mann. Bruce Davison stars as social misfit Willard Stiles, who is squeezed out of the company started by his deceased father. His only friends are a few rats raised at home, including Ben and Socrates, and their increasing number of friends. When Socrates is killed by Willard's boss, he goes on a rampage using his rats to attack.