^Nah, if all it took to make 'em starve to death was two kos (and it almost certainly was starvation, given the sunken cheeks) there wouldn't be any Patchoulis. I mean, Patchoulis may get husbands a lot, but what yukkuri would ever consent to being a Patchouli's wife? Such would be a surefire recipe for disaster, and thus for no more Patchoulis.
In other news, I'm thinking *way* too hard about yukkuri population sustainability.