Why doesn't Marty like Judd Travers in the book Shiloh?

Marty doesn't like Judd Travers in the book Shiloh because Judd is abusive towards his dogs, doesn't take good care of them, and doesn't treat them with compassion and respect. Marty, who loves animals, is appalled by Judd's behavior and feels a strong sense of injustice towards the mistreatment of the dogs.