Very good point. There’s clearly two different boxes in the public discourse when it comes to AI versus how we discuss animals. Willing to bet that 90% of the people who loudly make the argument about we should start considering if AI is sentient couldn’t care less about how other sentient animals are treated when they can provably shown to suffer pain and long lasting trauma.
Also I would say that we go much further than just enslavement - specifically looking at how male chickens and pigs are treated.
Factory farming is horrendous, but is far beyond "slavery" which is "just" a forced lack of agency, living conditions aren't relevant. A well treated horse is still enslaved. A chimpanzee in a zoo,
If we show models to be sapient, that's one thing. If they are shown to be merely sentient, there's no issue beyond the status quo of livestock and pets existing.