What kind act does Slim do for Lennie in "Of Mice and Men"?

Slim is Lennie’s protector on the ranch. Because Slim is well liked and respected by the other men on the ranch, he is able to keep Lennie from harm.  Slim originally thinks that Lennie isn’t mean but is just childlike and harmless.  When Lennie smashes Curley’s hand, Slim refuses to fire George and Lennie thus saving their jobs.  Slim even gives Lennie one of his puppies because he knows Lennie loves small animals like mice and rabbits.  However, Slim starts to learn more about how dangerous Lennie can be when he finds out that Lennie killed Curley’s wife.  At the end of the novel and after George kills Lennie, Slim reassures George that it was the right thing to do.  He tells George that he saved Lennie from being chained up and thrown away in a jail cell. 

Slim’s intentions towards Lennie were good, and he tried to help Lennie as much as he could.  However, Slim never fully understood Lennie’s dangerous side and the violent acts Lennie’s mental disabilities made him do.