Eating pets after they've died

I would never do this myself. I find it rather morbid. But my mother did eat one of her Koi fish after it died. I was so repulsed by this when she told me. I actually got mad at her. Not only because it seemed repulsive to me for someone to do this with their pet, but because she doesn't know exactly how or why it died. She said that for her she was brought up to never throw away food no matter what. She told me that in Italy, when she was young, they would eat the family dog if it died, so she didn't consider this any different. When you grow up poor and have no choice but to eat whatever is available, I guess that is a hard habit to break. Even though she is doing well financially now. It is still a big eww for me to even think about.