What are some symbols in Of Mice and Men? How do they relate to the plot and characters?

George and Lennie’s Farm

The farm that George constantly describes to Lennie—those few acres of land on which they will grow their own food and tend their own livestock—is one of the most powerful symbols in the book.

Lennie’s Puppy

Lennie’s puppy is one of several symbols that represent the victory of the strong over the weak. Lennie kills the puppy accidentally, as he has killed many mice before, by virtue of his failure to recognize his own strength. Although no other character can match Lennie’s physical strength, the huge Lennie will soon meet a fate similar to that of his small puppy.

Candy’s Dog

In the world Of Mice and Men describes, Candy’s dog represents the fate awaiting anyone who has outlived his or her purpose. Candy, much like his dog, feels just as useless.