What are some examples of foreshadowing in Charlotte's Web?

One example of foreshadowing in "Charlotte's Web" is when Charlotte first decides to save Wilbur by writing messages in her web, hinting at her eventual plan to help him avoid being slaughtered. Another example is when the old sheep mentions that the Zuckermans typically raise a pig to fatten up for the county fair, setting up the tension surrounding Wilbur's fate at the end of the story.