That is one Fantastic Pig!

So a traveling salesman driving through the countryside notices a pig out in the field with three wooden legs. He pulls in and drives to the house where he finds the aging farmer at work in the yard.
He tells the farmer that he noticed the pig and he was wondering about it. The farmer puffs up proudly and exclaims "Oh yes! That pig is one fantastic pig!" he goes on "about five years ago we were about ready to send him to the butcher when early one morning I was woke up by him snuffling and squealing. Turns out that a lantern had fallen over and started a fire in the barn. He saved out whole farm that day."
The salesman agrees that it is remarkable but presses the farmer - "so what about the wooden legs?" The farmer shakes his head and proceeds to tell about how two years prior there was a disturbance again and the pig was squealing and woke him up - some crazy driver drove through the fence and knocked a hole in it and all the horses were almost out. "That is one fantastic pig!" says the farmer.
The salesman still not getting it asks "so I can tell it is a special pig - but what is up with the wooden legs?" The farmer then describes how one time he was plowing in the back field and his tractor busted a steering thingy causing the wheel to lock up, flipping the rig and trapping him underneath. "That pig was the only one what heard my hollerin and he come runnin and rooted me out from under the tractor. Saved my life that pig did." The salesman still oblivious asked again 'What is the deal with the wooden legs though?" The farmer looked at him like he was crazy and says,

"A fantastic pig like that - you don't eat him all at once!"