Those who state that speciesism is unfair to individuals of nonhuman species have often invoked mammals and chickens in the context of research or farming. There is not yet a clear definition or line agreed upon by a significant segment of the movement as to which species are to be treated equally with humans or in some ways additionally protected: mammals, birds, reptiles, arthropods, insects, bacteria, etc. This question is all the more complex since a study by Miralles et al. (2019) has brought to light the evolutionary component of human empathic and compassionate reactions and the influence of anthropomorphic mechanisms in our affective relationship with the living world as a whole: the more an organism is evolutionarily distant from us, the less we recognize ourselves in it and the less we are moved by its fate.