Yes. We can focus just on the instances of pain that are seen as desirable (or a matter of indifference). Or we can imagine a masochist who enjoys all pain. The analogy only depends on there being some possible instance of this; we then have to ask, if we permit this in the case of humans, why we would find it abhorrent in the case of chickens.
Yes. We can focus just on the instances of pain that are seen as desirable (or a matter of indifference). Or we can imagine a masochist who enjoys all pain. The analogy only depends on there being some possible instance of this; we then have to ask, if we permit this in the case of humans, why we would find it abhorrent in the case of chickens.