Final answer:
The sentence that is foreshadowing in the excerpt is Sentence 4, which indicates 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. This sentence foreshadows that Doodle is no longer present in the narrator's life. The mention of remembering Doodle while sitting in the parlor indicates that Doodle is no longer alive or part of the narrator's current circumstances.
Learn more about foreshadowing in literature