“I have argued that this sort of thinking is problematic in at least two regards:
First, the notion that nonhuman animals do not have an interest in continued existence—that they do not have an interest in their lives—involves relying on a speciesist concept of what sort of self-awareness matters morally. I have argued that every sentient being necessarily has an interest in continued existence—every sentient being values her or his life—and that to say that only those animals (human animals) who have a particular sort of self-awareness have an interest in not being treated as commodities begs the fundamental moral question. Even if, as some maintain, nonhuman animals live in an “eternal present”—and I think that is empirically not the case at the very least for most of the nonhumans we routinely exploit who do have memories of the past and a sense of the future—they have, in each moment, an interest in continuing to exist. To say that this does not count morally is simply speciesist.
Second, even if animals do not have an interest in continuing to live and only have interests in not suffering, the notion that, as a practical matter, we will ever be able to accord those interests the morally required weight is simply fantasy. The notion that we property owners are ever going to accord any sort of significant weight to the interests of property in not suffering is simply unrealistic. Is it possible in theory? Yes. Is it possible as a matter of practicality in the real world. Absolutely not. Welfarists often talk about treating “farmed animals” in the way that we treat dogs and cats whom we love and regard as members of our family. Does anyone really think that is practically possible? The fact that we would not think of eating our dogs and cats is some indication that it is not.”
Gary L. Francione