In chapter one Lennie and George were walking to there new job when George noticed something. Lennie had killed a mouse unintentionally. George told him to get rid of it and that he had no business in killing mice. Therefor I was able to see Lennies fascination for soft things and how they might get you into trouble. This was easy to see through imagery and how the author painted it in my mind. The theme of this is don't follow temptation. As a result you could hurt someone or something.
In chapter two many men on the farm think Candy should let his dog go. They tell him that the dog is miserable and that it be better to shoot him so he can be at ease. Candy didn't argue so they shot him. This is foreshadowing another major event in the book. Using it the author was able to symbolize future events and how something bad was bound to happen. In conclusion the theme is telling you that it's easier to let something go, then to watch it suffer. This is repetitive through the book and very important.
In this chapter Lennie kills a puppy with no intention of it. Curley's wife told Lennie not to worry, and started to have a conversation with him. This lead to lennie being fascinated by her hair and killing her. In the same way he killed the mice and puppy. This foreshadows the ending of the book and the death of something bigger. In short things can die easily and get you nowhere.
This chapter begins with George finding Lennie in the brush. Lennie knows he did something wrong, an George tells him everything will be okay. Furthermore he tells him all of the things they will accomplish. While saying this he shoots him to put him out of his misery. This symbolizes the loss of their dream. Likewise that some dreams cannot come true. After all the theme is that without companionship dreams can't be achieved.