Final answer:
Sentence 4 in the excerpt is foreshadowing that Doodle is no longer present in the narrator's life.
Step-by-step explanation:
The sentence from the excerpt that is foreshadowing is sentence 4 because it suggests that Doodle is no longer present in the narrator's life. This implies that something tragic might have happened to Doodle, creating a sense of anticipation and building tension in the story.
Learn more about Foreshadowing in literature