In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.

Title: Dirty Pets. Sentence 1: John worked at a pet store. Sentence 2: And he was happy because it was his last day there. Sentence 3: But someone brought in a filthy pet. Sentence 4: But John could only stay so far away from it.
John was too sick to celebrate his last day at work.