On a cup at Chipotle restaurant:
Left to nature, dairy cows produce up to eight gallons of milk a day. This natural way has worked well for man and cow for eons.
However agricultural chemists have formulated a synthetic hormone that is injected into a cow to artificially increase milk production. Recombinant bovine growth hormone (rBGH) is used in the United States, but banned in other countries. Many farmers report rBGH causes maladies such as udder infections and joint problems. These synthetic growth hormones affect us, they’re just another thing we, and the cows, could probably do without.
Read about Chipotle at: Ode to a Burrito
But also see: http://www.ciw-online.org/Chipotle_debate.html