@Moon @feld @Hyolobrika
I mean, the health problems that arise from mixing between very different human groups (bone marrow transplants) don't really apply to dogs & wolves in the first place. Maybe it would be an issue if we were doing that for them (I'd have to check). But by that token, whatever criteria we use to separate coyotes and wolves into different species should be sufficient to separate a number of human groups into different species.