Horses, among other domesticated animals, had meaning in Jewish folk literature also.
Trachtenberg quotes from a thirteenth-century work, Ets Chayim (The Tree of Life). The excerpt is discussing omens, especially those in dreams to determine the interpretation of a dream.
As we know, since the time of Joseph, Jewish dream interpretation has been considered most important: “...A white horse is a good omen; a red horse a bad, he will be hounded and pursued; a donkey, he may be confident of salvation...”
(from Trachtenberg, Joshua. Jewish Magic and Superstition: A Study in Folk Religion. New York: Atheneum, 1970, p. 239)