Fair enough. I'm certainly not trying to minimize their importance.
But slavery isn't legal in the West anymore. So we don't need abolitionists for slavery for humans.
But meat and dairy and eggs ARE legal. Just like slavery was legal. And now it's not. I believe it is an issue today that humans of the future will look back on as we do slavery now, with the same outrage and horror that humans were ok with using other beings' suffering for their own selfish pleasure. Momentary pleasure, in exchange for a lifetime of pain and fear.
Would you have been an abolitionist had you lived in the south during slavery? I'm not sure you would have. Because the same arguments for why slavery should continue relied on dehumanisation tactics, "black people don't feel pain the way we do, they aren't as intelligent as we are so they don't mind" etc "what about the economy" etc and it was NORMAL so that ordinary "good" people didn't see a problem with it at the time, despite us all NOW seeing how obviously evil it was.

The argument that "they aren't the same as us because they look different, they don't speak our language, therefore moral consideration we give to "normal people" doesn't have to apply". That's was used during slavery against humans. It's also used to justify the slavery of animals, and their wholesale murder.