I don’t think these horses are wild since you could get quite close. There are about 100 Navajo families who live and farm on the canyon floor.
All the ruins are from the Anasazi (sounds like Anastasi) people who disappeared from here around 1200. The Navajo didn’t come until 1300-1500. The guide said the Navajo people never go into the cliff dwellings because the spirits of the Anastasi are still there.