Pig farmers are increasingly using wet by-products such as wheat starch and potato steam peels due to the high cost of compound feed raw materials, with prices having increased significantly due to factors such as lower yields, increased demand from China, and adverse weather conditions in South America. Despite these price increases, by-products still offer a higher return for livestock farmers. The sales of brewer's grains, a popular by-product in dairy farming, are doing well despite the corona crisis, and the supply of potato by-products is reasonable, with prices having decreased due to increased supply. Wheat yeast concentrate, a protein alternative to soy, is scarce but relatively competitively priced.