Quote:
Originally Posted by Morthoron
That is up for conjecture. Sauron bred the Uruk-hai in the 3rd Age, a much larger breed than any previous Orc. Such a noticeable size variation in a fairly stable stock would indicate cross-breeding, as far as my genetic knowledge goes.
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Not necessarily. It might have been simple artificial selection as when Men breed dogs. Just select the biggest and fiercest and let them interbreed.