In the beginning of the story, what kind of animal did Lennie keep accidently killing? How does that foreshadow later events in the story?

Lennie kept accidentally killing small animals, like mice and puppies, due to his immense strength and lack of understanding of his own power. This pattern highlights his tragic inability to control his impulses, foreshadowing the later, more devastating events in the story. His actions with the little creatures serve as a metaphor for his overall vulnerability and the fragility of life around him. The repeated incidents of Lennie's unintended violence reveal deeper themes of innocence and destruction, setting the stage for the novel's exploration of dreams and the harsh reality of the world. His innocent desire to pet soft things ultimately leads to dire consequences, hinting at the tragedy that awaits not only himself but also those he interacts with, such as Curley's wife.