Feed costs make up 65-75 percent of the cost of producing pork, and the ration you feed plays a major role. But keep in mind that it's your over-all management that can make the difference between success and failure.
Whiteker, McElwyn D. and Stevermer, Emmett
"What Is a Good Swine Ration?,"
Iowa Farm Science: Vol. 17
, Article 3.
Available at: https://lib.dr.iastate.edu/farmscience/vol17/iss9/3