from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Not
from Wiktionary, Creative Commons Attribution/Share-Alike License
I don't know how this fits into your theory, other than to say it's not that N.A. animals were undomesticable, rather that people chose not to domesticate them.
It is clearly a reasonable supposition that some of these primitive canine species may have been far more domesticable than the existing kindred of the dog -- the wolves, foxes, jackals, or hyenas -- differing from their fiercer kindred much as the zebras do from the wild asses, the one form being utterly undomesticable, and the other lending its back almost willingly to the burdens which man chooses to impose.
Our American bison, though a much milder-spirited beast, seems also to be essentially undomesticable for the reason that he cannot be taught to subordinate his desires to the will of man.