70.D.Fraser,“TheRoleofBehaviourinSwineProduction:a
Review of Research,” Applied Animal Ethology 11: 332
(1984).
71.D.Fraser,“AttractiontoBloodasaFactorinTailBiting
by Pigs,” Applied Animal Behaviour Science 17: 61–68
(1987).
72.Farm Journal, May 1974.
73.TherelevantstudiesaresummarizedbyMichaelW.Fox,
Farm Animals: Husbandry, Behavior, Veterinary Practice
(University Park Press, 1984), p. 126.
74.Farmerand StockbreederJanuary 22,1963; quotedby
Ruth Harrison,Animal Machines, p. 95.
- “Swine Production Management,” Hubbard Milling
Company, Mankato, Minnesota, 1984.
76.WilliamRobbins,“DownontheSuperfarm:BiggerShare
of Profits,”The New York Times, August 4, 1987.
77.Feedstuffs, January 6, 1986, p. 6.
78.Hog Farm Management, December 1975, p. 16.
79.BobFrase,quotedinOrvilleSchell,ModernMeat(New
York: Random House, 1984), p. 62.
80.FarmerandStockbreeder,July11,1961;quotedinRuth
Harrison,Animal Machines, p. 148.