Under those circumstances, one begins to wonder if by the Third age, the line between Ent and Huorn was more or less an academic one, if there was a point where the ents had become so like trees and the trees (huorns) so like Ent's that there was functionally no difference between the two in term of anything but what they had started out as. Indeed while i simply assumed that a young ent needed an ent and an entwife to come into being, if they are spirits inhabiting trees, maybe the Huorns are Ent children(ore more accurately, a phase of ent development) maybe after a Huorn has live long enough and become Entish enough, it is an Ent. Then the possibility of them needing expansion room evetually makes sense.
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