I had a big Akita Yoshi who was fabulous. I loved him. We lost him when he was 12 and I've never been able to replace him. Normally most people lose a pet and get another and keep going on. But it just felt wrong to me it felt disloyal.
One of the great questions of philosophy is do we innately have morality or do we get it from celestial dictation? A study of the Ten Commandments is a very good way of getting into and resolving that issue.