Speech of July 19, 1985. Quoted in David Robinson Simon, Meatonomics (Conari Press, 2013), p. 193 https://books.google.it/books?id=PY0KUnaIU5AC&pg=PA193.
“The public buys its opinions as it buys its meat, or takes in its milk, on the principle that it is cheaper to do this than to keep a cow. So it is, but the milk is more likely to be watered.”
Public Opinions
The Note-Books of Samuel Butler (1912), Part XVII - Material for a Projected Sequel to Alps and Sanctuaries
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Samuel Butler 232
novelist 1835–1902Related quotes

July 21, 1763, p 514 http://books.google.com/books?id=JOseAAAAMAAJ&q="Truth+Sir+is+a+cow+which+will+yield+such+people+no+more+milk+and+so+they+are+gone+to+milk+the+bull1"&pg=PA514#v=onepage
Life of Samuel Johnson (1791), Vol I
Context: Hume, and other sceptical innovators, are vain men, and will gratify themselves at any expence. Truth will not afford sufficient food to their vanity; so they have betaken themselves to errour. Truth, Sir, is a cow which will yield such people no more milk, and so they are gone to milk the bull. If I could have allowed myself to gratify my vanity at the expence of truth, what fame might I have acquired.

“The sweet mellifluous milking of the cow.”
The Milking of the Cow, reported in Bartlett's Familiar Quotations, 10th ed. (1919).

“Dubai is now reduced to its component sounds: do-buy”
Tweet Jan 6, 2010, 5:45PM https://twitter.com/basselsafadi/status/7462123817 at Twitter.com

Quoted in Jeffrey M. Masson, The Face on Your Plate: The Truth About Food https://books.google.it/books?id=-LeUV2wr2BoC&pg=PA0 (Norton & Company, 2009), p. 194.

“You may not sell the cow and sup the milk.”
Quoting an old adage in Nordenfelt v. Maxim Nordenfelt Guns and Ammunition Co. (1894), L. R. App. Cas. (1894), L. R. App. Ca. Part 5, p. 572.