What are some examples of foreshadowing in chapter 3 of mice and men?

In chapter 3 of "of mice and men" the main event that is foreshadowed is the death of Lennie in the latter part of the novella. Half way through chapter 3: Slim, George, Candy and Carlson are gathered in the bunk house. Carlson, who is repulsed by the smell from Candy's dog, tries to convince Candy to let him shoot his dog. Candy's dog is "stiff with rheumatism", "ancient" and he "suffers himself all the time". Carlson says to Candy that he "ain't bein' kind to him keepin' him alive". Carlson says that Candy should let him kill his dog out of mercy, that they shouldn't let him suffer.

This foreshadows the death of Lennie in chapter 6, when George kills Lennie out of mercy. Also: the manner in which the dog was shot, "right at the back of the head", is the same way that Lennie was killed. Candy's dog can also be compared to Lennie in the fact that they are both humble and simple beings. Both of them were distracted, because they didn't know any better. Their lifes rely on trust.