Is whey a good feed for hogs, and should it be supplemented with another feed?

H.B.WisconsinAnswer:The resources listed below offer several sources of information dealing with feeding whey to hogs. They provide specific information on using liquid whey as an ingredient in hog rations, as well as information on using liquid feed (containing whey) and liquid feeders. Two of the articles discuss possible problems in feeding pigs whey, including gastric ulceration and other health problems. The feed value of whey is referenced in two of the listed resources, to help formulate rations to meet hog nutrient requirements.The answer to your question on whether whey has to be supplemented with grain is yes. Most of these publications discuss using various types of grain products. One of the resources listed below, an archived e-mail from Sergio Piccinini, addresses whey-feeding of pigs to produce specific products. Mr. Piccinini writes about swine production in Italy. He states that the Large White breed is better than the indigenous breed of black-coated pigs in their whey-fed production practices. His letter suggests that Parma and San Daniele hams are produced using a whey-diet. Meanwhile, the reference from the Food Network Encyclopedia states that Parma ham is produced by hogs eating a chestnut and whey diet. An article abstract from Scandinavia addresses hog carcass quality of whey-fed hogs. The section from Feeds and Feeding is from the 1951 edition and seems to suggest that whey from Swiss cheese might have a higher value than whey from American or Cheddar cheese factories.Resources:Anon. 1975. Feeding liquid whey in swine fattening rations. North Dakota State University, Dickinson Research Extension Center. 3 p. 2005. Swine diseases (Intestines) ? Gastric (Stomach) Ulceration. Iowa State University, College of Veterinary Medicine. 4 p. No date. Utilization of liquid whey as fodder. 1, K., R. Friendship, and C.F.M. de Lange. No date. Microbiology of liquid feed and feed ingredients. University of Guelph. 1 p., Peter H., and Jane D. Beal. 2004. Liquid feeding of pigs: Implications for pig and human health. University of Plymouth, UK. 11 p., W. 1990. Intestinal syndrome of absent fermentation in swine after liquid feeding of easily-fermentable components. 1 p. Network. 1995. Parma ham. Encyclopedia. 2 p.,7770,3223,00.html Feedstuffs. 2005. Whey, liquid. Feedstuffs Reference Issue & Buyers Guide. 1 p.Food and Agriculture Organization of the United Nations. No date. Milk by-products, skim milk, butterfat, whey. 4 p., Anja, et al. 2003. Effects of sex, feed and pre-slaughter routines on technological meat quality in carries and non-carriers of the RN allele. Acta Agriculturae Scandinavica. Sept. 1 p.Illingworth, Clare. 2005. Liquid feeding takes hold in Ontario. Ontario Pork Newsletter. April. 5 p. Lange, C.F.M. 2005. Liquid feeding of swine: Potential positive and negative impacts on pork safety. Ontario Ministry of Agriculture, Food, and Rural Affairs. SF601. 2 p. and Livestock Commission. 2003. General guidelines on liquid feeding for pigs. 12 p., Frank B. 1951. Whey for swine. In: Feeds and Feeding: A Handbook for the Student and Stockman. The Morrison Publishing Company, Ithaca, NY. p. 590-593.Murphy, Janice. 2003. Comparative feed values for swine. Ontario Ministry of Agriculture, Food, and Rural Affairs. 7 p. Research Council. 1983. Animal By-Products: Dairy Whey. In: Underutilized Resources as Animal Feedstuffs. National Academy Press, Washington, D.C. p. 28-30.Piccinini, Sergio. 1998. Subject: feeds. 2, Jeanine. 2005. New liquid feeding system means healthier pigs, lower costs. Pigs, Pork & Progress.