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 :) :)
