The country that was responsible for introducing livestock and cattle ranching in the southwest was Spain.
Explanation:
The Spanish introduced the first livestock and cattle heads into the region of Texas, that would later lead to the development of cattle ranching. Spain and France were battling over the territory west of the Mississippi River and in order to stop the French from expanding, the Spanish introduced their famous "missions". <em>Priests, soldiers, colonists and over 5 thousand head of Spanish cattle</em> were sent to this territory. When France lost the French and Indian War, these missions were abandoned and the cattle ranching activity started as a lasting profitable activity.
Ancestors of the Texas Longhorn were first brought to the North American continent in 1521 by Gregoiro de villalobos, just six months prior to the subjugation of Mexico City and the establishment of New Spain for the crown of Emperor Charles V. Therefore it was Spain that introduced cattle ranching. Hope i helped man!:D
