Undercover videos produced by animal rights groups are fueling a
debate over the need for new laws to regulate the treatment of
American dairy cows.
...
An investigator for the group Mercy for Animals worked at the New York
dairy farm, Willet Dairy, one of the largest in the state, for two
months as a mechanic.

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full story:
http://abcnews.go.com/Blotter/animal-rights-us-dairy-industry/story?id=9658866