Pork

 
Did you know pigs are considered to be the smartest of all livestock?
Pigs digestive system is very similar to the digestive system of human beings.
In the 1960's the desired slaughter weight for hogs was 200 pounds. Today hogs are slaughtered at 280 pounds. The hogs today are younger and eat less feed to get to the 280 pounds than the 200 pound hogs of the 1960's.