I think that the first step is to get it commonly accepted that battery farming is immoral, and therefore should be illegal. Once the premise is there, reform will be a lot easier.
Getting people around to the concept is going to be trickier. Most people exist in blissful ignorance of what they are eating, but I also believe that most of them would be horrified if they saw the conditions that they were supporting.
So the challenge is to make people more aware of what they are eating, which is a nice side-effect of a food labelling campaign such as this.
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