What is the relationship between candys dogs death and lennies death?

The death of Candy's dog foreshadows Lennie's death. There are lots of parallels: the dog is a faithful friend to Candy and Candy doesn't want to lose him. It's the others who urge him. He gives in when they convince him that otherwise the dog will only suffer. Later he admits to George that he should have shot the dog himself. That's what George then does to Lennie.