Well, one of the best examples is the case of a male Lion in Africa. Old, large, but too old to have offspring but still too large to be taken over by a younger male Lion. They allowed it to be hunted so that a younger male could take over the pride and create offspring which was better for the pride. There are other examples.

I can't find the story on it but I read it a long time ago.

https://www.nationalgeographic.com/science/article/trophy-hu...