Well the thing is those chickens and cows (etc.) are also ensouled beings. To be considered "alive" something just has to be born in accordance with the laws of creation (nature) and given a soul by the planet. This was even verified before Shadowbringers by way of Krile's Echo letting her speak with beasts and Alpha starting off as a soulless familiar (for want of a better term) before he develops / is gifted a soul by the planet (letting us understand what he's trying to say via the Echo).
So still you can just go "Lol so you value cows' lives more than those of people's?" when arguing this point to ridicule and shut down the opposition to thunderous applause, even though the metaphysics of XIV make it rather more complicated than that.