Take it for what its worth but I was raised with hogs and still help out with the family farm, and butcher around 30 pigs a year. Most hogs today are raised in a confinment style housing. That being we as producers are in it to make money, the public wants a leaner pig. So we adjust our food rations to meet that demand. Our confinment pigs are very lean animals and thats mostly what you will get from most large stores. Now I do 2 or 3 pigs a year that some one will raise just for somthing to do these are raised on the "ground" and eat alot diffrent than our commercial hogs. Ever eat a hog that ate alot of acorns YUCK! Its kinda like when you guys smoke meat everything you do diffrent will effect it. As large operators we like to have that consistancy and thats what sells. Our hogs are breed to be lean but if you toss them out in a pasture and feed them table scraps they will produce a fattier pig. I think each breeder of hogs likes to think there is the best Berkshire, Hampshire, Duroc, Chesterwhites you name it. And all breeds are diffrent but there is a reason major producers don't use Breed X on the farm, they don't produce like our new genration hogs. My sugestion would be to look for a local farmer on craigs list that raises hogs on the ground if you really want a lil more fat on your hog and not worry so much about what breed it is.