He feels sorry for Lennie
Candy was upset at the end of Chapter 5 of "Of Mice and Men" because he realized that his dream of owning a piece of land with George and Lennie was shattered due to Lennie's actions. Lennie accidentally killed Curley's wife, leading to grave consequences for their shared dream. Candy felt hopeless and devastated as he saw their vision of a better future slipping away.
Because he can.
He feels sorry for Lennie
In Chapter 3 of "Of Mice and Men," Candy's dog is shot and killed by Carlson. Candy is deeply upset by the loss of his beloved companion but ultimately agrees to let Carlson put the dog out of its misery due to its old age and failing health. This event foreshadows Lennie's fate at the end of the novella.
In Chapter 2 of "Of Mice and Men," the conflict between Slim and Candy arises when Slim suggests that Candy should let his old dog be put down because it is no longer useful. Candy is attached to the dog and doesn't want to let go, while Slim argues that it would be more humane to end its suffering. They ultimately agree to have Carlson shoot the dog.
Really Upset - I was crying at the end of the story
When Candy lost his hand, he got $250, he has $50 in the bank, and at the end of the month he is getting $50 more. Candy has $300 saved now and at the end of the month he will have $350 saved.
check sparknotes.com
At the end of Chapter 3 in "Of Mice and Men," Curley promises to get George and Lennie into trouble for talking to his wife. He threatens to report their behavior to the boss in an attempt to assert his authority and dominance over the other ranch workers.
In this chapter, George has gone to Soledad with the rest of the ranchers, as they would often do on Saturday night. Contrary to Crooks' belief however, he has not gone to drink and visit the brothel like the other men. This is revealed when Candy says he has not taken any money with him (because they are saving up to buy the land Goerge has found). During the chapter, Crooks teases Lennie and makes him believe George will not be coming back. George does however come back at the end of the chapter and enters Crooks' room with Candy and Lennie and tells them to LEave Crooks alone.
In Chapter 4 of "Of Mice and Men," Crooks is visited by Lennie, Candy, and later Curley's wife. They end up in Crooks's room after Lennie is forbidden from entering the bunkhouse by the other men. Each character is seeking something different - Lennie wants companionship, Candy wants a sense of belonging, and Curley's wife wants to alleviate her own loneliness.
Sydney Carton is sad and upset at the end of Chapter 5 of "A Tale of Two Cities" because he sees how wasted and dissolute his life has become compared to the idealism and purpose of those around him, especially Lucie Manette and Charles Darnay. He realizes that he is a self-destructive and unfulfilled man, leading him to despair.
In chapter five, when George discovered the death of Curley's wife, he told Candy to wait for a few minutes before starting their plan. He disappeared for a while and Candy screamed for help. After the workers and Curley discovered his wife, George came back in. In the end, he killed Lennie with Carlson's gun.
At the end of Chapter 6, the boys reenact the hunt and killing of a pig by pretending to be the pig and carrying out the act. This display of savagery triggers guilt and discomfort in Ralph, as it reveals the boys' descent into barbarism.