Animal Rights

Livestock: genetically engineered not to suffer

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Doctoral student Adam Shriver writes in The New York Times of February 18, 2010 that it is likely that livestock can be genetically engineered so that they will lack the ability to suffer. 

Mice have already been genetically engineered in this way.  These mice are able to recognize and avoid painful stimuli, but lack the ability to sense pain as unpleasant.   This is possible because the brain has two separate pathways for sensing pain, and one pathway can be disabled while the other is left intact.