UNLIKELY——ALCOHOL is POISON to a horse.
Really? How about asking a veterinarian?
https://practicalhorsemanmag.com/health-archive/feed-beer-horse-16487/#:~:text=The%20alcoholic%20content%20is%20not%20a%20concern%2C%20as,in%20the%20horse%E2%80%99s%20large%20intestine%20during%20normal%20digestion.