HWH Comment: I don’t know if the response would be the same in the USA. Canadians seem to be in general more sensitive, caring, polite people. Maybe that’s a stereotype, but I am part Canadian and that has been my observation, however limited.
Definitely give it a try in America. Every major city – frankly any town too! Why not use the billboard as a teaching tool – a change the world tool? If they can’t go to a slaughterhouse, then bring the slaughterhouse to them.
Americans focus on organic. Screw the animal – as long as it’s grass fed before it gets slaughtered, their conscience is clear.