You will be given a definition of a task first, then some input of the task.
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: Halie's Cat. Sentence 1: Halie adopted a foster cat. Sentence 2: The cat was disturbed, having been abused in her previous homes. Sentence 3: Halie put her full effort into retraining her. Sentence 4: The cat would not stop scratching and biting people.
Output:
Halie had to put the cat down.