FeatheredFeet is correct about dwarfism. If you're looking for breed or show you certainly don't want a dwarf. Dwarfism comes in many degrees of the condition. My Lily is a dwarf but condition not severe BUT she has monkey mouth (bottom teeth jut out and top teeth meet gums behind the bottom teeth), her head is a bit too large for her body, she's pudgy (some of the pudgy is from eating too much grass but even as a baby she was a cubbette) and not so much a dwarf condition is locking stifles. Locking stifles is more common in mini's than large horses and lily has both back legs lock. I spend more money on the dentist than if she was correct. However she's perfect in my eyes but be aware of what you're looking at. Featheredfeet was wise to mention it to you.