A lifetime ago, I kept pigs when I lived at Tamworth. They were fed on grower pellets made from grain and starch making byproducts. The starch manufacturer was an outfit called Fielders and they kept their own pigs as well. Fielders would irrigate their corn (maize) paddocks with the waste water. Sometimes the "Fielders Flats" would get an awful sour smell but the corn grew well.
My chooks get fed all the kitchen scraps and they love them! They get ad lib chook pellets as well but they prefer scraps. What they love most is escaping from the chook pen and scratching up the mulch under my lime trees.