Four friends, called Sarah, Luke, Mathew and Jane, decided to buy a goat to sell its milk and cheese. They all agreed that Sarah would clean the goat, Luke would feed it, Mathew would give it water and Jane would milk it.
I wonder why it's sick.
Maybe it got an infection?
But one day Luke decided that he would not feed the goat because it always nibbled his fingers.
The goat grew increasingly hungry and got ill.
Nobody knew what had happened to the goat apart from Luke, but he never told the others.
Eventually the goat died because it was underfed.
Now Sarah, Luke, Mathew and Jane had no source of income because they made money by selling the goat's milk and cheese.