Humans are persons. Humans are also animals. That line has also defined law. Now, that line may extend out to include primates. We know primates are animals, but are they persons, or do they at least deserve some of the protections and privileges of personhood? The humane treatment of humans is a central tenet of law. Decades ago we extended the protection to the humane treatment of animals, in some cases. When the line was just drawn around humans, the limits were clear. Courts will decide if higher primates are also inside that line. Where does the line go from there? An interested debate is ensuing that may extend to other mammals, beyond mammals, influencing our pet policies and food supply.