This chapter seeks to strengthen the account of the Principle of Multispecies Legality offered in the previous chapter by responding to potential queries and concerns around the proposal’s structure, scope, and feasibility. The outlined concerns are as follows: that the PML is an attempt to redefine legal personhood; that a focus on interests is too inclusive, in that in opening the doors of legal inclusion to a relatively wide range of beings and entities it would put undesirable constraints on human activity; that a focus on interests is too limited in that it doesn’t capture the full scope of animals’ capabilities; that the PML will result in the equal treatment of humans and all other animals; that we shouldn’t base a being’s worth on their possession of a particular characteristic; and that the PML will be too unfeasible to implement.