Why is を used in this situation? 私は先生がネコを好きだと思います?

Question

私は先生がネコを好きだと思います Why を and not が twice?

Answer 1

By putting を instead of が, it is emphasizing the cat and making the teacher a detail instead of a subject. が would also be appropriate in this situation, however it would be a less defined sentence and slightly loose what the speaker was trying to say.