Unless George watched over Lennie at all times, I don't think something like this could be prevented. Lennie would inevitably make this type of mistake because he understood very little about his own impulses and others didn't understand him.
Of Mice and Men study guide contains a biography of John Steinbeck, literature essays, quiz questions, major themes, characters, and a full summary and analysis.
Of Mice and Men essays are academic essays for citation. These papers were written primarily by students and provide critical analysis of Of Mice and Men by John Steinbeck.