"Miniature horses" refers to very small horses that are bred to be smaller than average horses. They are like tiny versions of regular horses. Full definition
She has a special interest in animal - assisted therapy and helped train miniature horses for therapy programs working with young children. (fcnmhp.org)
What happens when you put two of the biggest indie movie stars in the same film and throw in an adorable, scene - stealing miniature horse into the mix? (indiewire.com)