The Old Person And The Donkey

And you have heard the story before...
The old person was very poor and could barely feed themselves, let alone their donkey.
So they fed the donkey less: and the donkey seemed fine.
So they fed the donkey less still, and the donkey still seemed OK.
Eventually, they were feeding the donkey very little, and the donkey still survived.
So they decided that the donkey could live on nothing.
So the donkey died.