Language and Symbolism
The language of the narrative is fairly simple; most vocabulary is of an everyday kind, except for names of items of farm equipment to which Steinbeck refers. In the dialogue, Steinbeck uses slang and non-standard terms (“would of”, “brang” and so on) to convey an authentic sense of the speaking voice.Apart from the symbolism in the title, we should note the symbolic function of the killing of Candy's old dog. At various points in the novel shooting is mentioned as a way out of trouble (as when George says he would shoot himself if he were related to Lennie). The killing of the dog parallels the shooting of Lennie: both are depicted as merciful, in both cases the shot is in the same place (base of the skull) and Slim approves both killings.
Where else in the text can you identify animal parallells?
They could be simile's, metaphors or straightforward references.