What is does Candy's dog symbolize in of mice and men?

Candy's dog symbolizes the journey all the workers have gone through, and in a way to me he foreshadows Lennie's death. Candy's dog also is symbolic of his love and friendship towards another animal. In a way, the useless old dog is a reflection of Candy and his old, handicapped state. The death of Lennie and Candy's dog seem similar. Both seem to have a test to spare the one's they love. Candy must spare his dog from the pain of staying alive. George must spare Lennie from the wrath of Curley.

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