World’s Smallest Horse: cm tall. But even for the breed Thumbelina is particularly small: she is thought to be a dwarf-version of the breed. At just 60 lb and tall, the five-year-old Thumbelina is the world’s smallest horse.
Rare Twin Horses- when my mare& ultrasound showed she was having twins, the vet when in and pinched one of the embryos off so one could survive. Twin horses usually do not go full term and are born too early to survive.