The Selfish Dog

Once upon a time, a farmer had an ox and a dog. He used to take the ox to help him in his fields and the dog used to watch the farmer's house at night.

One evening the ox returned home very tired. He was very hungry. While walking to the stable, he saw a bowl of milk. Because he was hungry, he drank it without giving it a second thought. He went to the manger to eat hay. But he found the dog sitting on it. "Why did you drink my milk?", The dog barked.
Ox explained that he was starving after working hard for the whole day in the field. But dog would not listen to anything. He was extremely upset and angry.   

The dog barked at him and would not let him eat the hay. The ox said to the dog, "Please, get aside and let me eat the hay. It is of no use to you."

But the bad natured dog replied, "Since I myself cannot eat the hay. I will not let anyone else have it." So the ox had to go hungry that day.