I am not convinced he is a dwarf. He does, however, have a congenital deformity (I am pretty sure it is scoliosis) that has necessitated his having steel rods put in all down his spine- the claimed the mare lay on him but we all know, I think, just how likely that is- possible? yes. Likely? no. Anyway, he now moves like a crab, hobbling along sideways. They still give him no access to other horses- well, that would break their "unique" bond with him wouldn't it? People, we are dealing with un-horsy people who have not a clue what they are doing and have way, way too much money and time on their hands, If he is a dwarf, and they breed him, his foals will either be normal height or dwarfs, so it seems pretty much self limiting. It is galling that they are promoting him as a perfect little horse but who is listening? The AMHA is not promoting him, neither are any of the other registries, and if the claim on their website galls that much then send them a legal challenge- prove it or take it down, as he is larger than the horse in the Guinness records book, which is the accepted "expert" in this case.
The roach back is part of the scoliosis btw and the one thing I really would take issue with the owners over is the pain and suffering they put the animals through to have this op done- it is extremely painful and doctors will think hard and long before putting a child through it, why would you do it to an animal? The recovery time is long too, and also painful, I think we all know how hard it is to make these decisions but most of us put the animals feelings first, not our own.