That is false and very ignorant.
One of the first conclusive pieces of evidence of the existence of dogs in the American Continent before the arrival of the Spanish is found in the written statement of Father Sahagún who examined and wrote of the things he observed:
"The dogs of this land have four names, called: Chichi, Itzcuintli, Xochiocoyotl, Tetlamin; and also tehuizotl.
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