A visitor to a farm spotted a pig with only three legs. He said to the farmer, "Why don't you put it out of its misery?"

The farmer drew a deep breath, shook his head and said, "Let me tell ya about that pig. One night last year, the house caught fire and the pig ran through the house and woke everyone up. Thanks to the pig, we all got out safely. Then last month my tractor overturned and that pig went to get help. He saved my life."

"I understand," said the visitor, "but still..."

"Look buddy," snapped the farmer, "pig like that, you don't eat him all at once."