Skiff Miller wanted to take the dog back and go to Alaska with him, but to do this he would have to take it from the couple that took the dog in and took good care of it. Skiff Miller must have gotten attached to the dog and felt a sense of love, he believed he was the better owner and that the dog wanted to be with him more than the couple because he raised the dog like he was its mother. That's all I remember from the book, hope it helps :) :)
Pi thinks the hyena never attacked him because the tiger was in the boat.
In the beginning, there were more 'passengers' on the ship - the hyena, a zebra, and an orangutan. However, the hyena killed the zebra and the orangutan, but never dared to actually attack Pi as well, because of his friend, the tiger named Richard Parker.
It takes hard work to achieve your goals. They have to defeat the beast three times which is hard work but worth it. Hope this helps! :))
