Bunnylady
Herd Master
When I showed miniature horses there were two different registries for them. One for the mini's under the height allowance and one for the mini's over.
That's not quite correct. Some miniature horse registries have two height classes, the A's which are under 34", and the B's which are 34" - 38" , but if the horse is more than 38" tall, you can't register it, nor can its offspring ever be registered. At one time an animal could be hardshipped in based on size, but no more - not in the registries that are viewed with respect, anyway.
I know that there are a few registries that have special registration for animals that don't fall within the standard ("breeding stock" Paint horses, or part Shetland sport ponies, for example) but that's generally for the purpose of competing in some sort of athletic endeavor.
I would think that for conformation purposes, if height is part of the standard, then getting the proportions right would necessarily involve keeping your breeding stock at least close to the standard's stated height. I know a lot of rabbit breeds have both a minimum and a maximum size; people pushing the size too far one way or the other usually wind up sacrificing some pretty important features of type and get animals that don't really fit the standard in other ways.
I've heard some people say that dog shows and breed standards have been the ruination of some dog breeds, as people have pushed the animal's form way beyond what can possibly perform whatever the breed's original function might have been. Do you think there's any danger of that in dairy goats?