Context: We rigged it up so that it works again , but it 's no longer a textbook SPL system . We 're going to keep up the meds for another week , but reduce her Banamine from 500 # twice a day to 500 # once a day . Rosie did not act like a lady for Megan today .

Question: What may be the reason why they needed to adjust the medicine ?
Options:
0. They could n't afford it anymore .
1. They wanted to see if she did n't need it anymore .
2. They want to try a natural approach .
3. It was no longer working .
Answer: 3