With the price of corn rising because more is being used for ethanol purposes, Ontario farmers have reason to look for alternative energy sources for pig diets. In this experiment pigs were fed different diets consisting of co-products as replacements for corn. 160 pigs, both male and female, were put on one of four diets to find if feeding co-products effected growth performance and carcass quality. Diet one was a conventional diet, the second had moderate amounts of co=products, the third had aggressive amounts of co-products and the last diet had added potassium carbonate to match levels of diet 3 to see if the increases potassium carbonate had negative effects on the pigs. Pigs on the non-control diet had reduced growth performance of 5% but did not have any change in feed efficiency and carcass quality. Although at high rates of co-products some kidney problems were detected. Also the pigs who received the increased potassium carbonate (diet 4) had some abnormalities in the kidneys. The paper suggests that a look into the problems being caused in the kidneys should be explored.