>They should be nicer to them when they kill them ... /s
An example (from Dominion) is how they typically asphyxiate cattle immediately before slaughter: using carbon monoxide (when nitrogen would be far less painful/cruel, but costs a few ¢¢¢¢ more).
I fell asleep watching this movie during that scene, and it led to horrific limbic states.
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Of course I still consume animal products, but watching that film entirely ended swine for me (and greatly reduced my overall meat consumption).
To be totally clear, I've seen it and am vegan. My comment is a sarcastic tribute to the typical response to the suggestion people learn what their dietary choices involve.
A more effective means of bringing about change might be to protest and lobby for requiring by law more humane methods of raising and killing animals for food. I think far more people would be supportive of that approach.
/s