This chapter provides an overview of co-products and other alternative feedstuffs for sustainable pig production. It opens with a discussion of feed evaluation, animal growth and carcass characteristics. Focus then moves to meat quality and animal health. After this, the chapter highlights the connection between sustainability and feed, in particular the greenhouse gas emissions of pigs, and the human-edible protein balance of swine and amount of land required to produce it. The chapter ends with a case study of the use of canola co-products as feedstuffs for pigs.