A dog found a piece of bone. He picked it up and looked around. When he didn't see anyone, he ran off with the bone and started looking for a secluded, peaceful place to chew it. He reached the riverbank and began to cross the river on a bridge.
While crossing the river, he saw his reflection in the water. He mistook it for another dog with a bone. Greedy, he decided to snatch the bone from the other dog. But as he opened his mouth to bark, his own bone fell into the water. He tried to retrieve it, but it had sunk into the river.
Greed often leads to loss.