“In 1912, Russia held the most horses in the world, with the U.S. having the second-highest number.[36] There were an estimated 20 million horses in March 1915 in the United States.[37] But as increased mechanization reduced the need for horses as working animals, populations declined. A USDA census in 1959 showed the horse population had dropped to 4.5 million. Numbers began to rebound somewhat, and by 1968 there were about 7 million horses, mostly used for riding.[35] In 2023, there were about 6.65 million horses.[1]”
I think there are way more horses now?
https://en.wikipedia.org/wiki/Horses_in_the_United_States
“In 1912, Russia held the most horses in the world, with the U.S. having the second-highest number.[36] There were an estimated 20 million horses in March 1915 in the United States.[37] But as increased mechanization reduced the need for horses as working animals, populations declined. A USDA census in 1959 showed the horse population had dropped to 4.5 million. Numbers began to rebound somewhat, and by 1968 there were about 7 million horses, mostly used for riding.[35] In 2023, there were about 6.65 million horses.[1]”