In '84, when I discovered a miniature breeder 'within reach' of me and began visiting there, buying my first 'seed stock', the owner and I became friendly, and he confided that at EVERY farm he'd visited/bought from(several of the earliest/'biggest' names of the time), he'd seen goodly numbers of obviously oversized horses-mainly, mares. His stallions were ALL 'legal'( I know; I measured each and every one of the 8-10 he had originally)-- some even quite small, but he had FEW mares (he'd bought from a good number of those 'original' farms; I could tell you the names today) that weren't oversized. 'Talk' was, and still is, at least in some quarters, that this situation is not uncommon in the industry, even today.
I IMMEDIATELY invested in a measuring stick, so I could 'be sure' of what I bought(everything he had was for sale; though the farm was 'in the name' of his daughters, I always felt it was mostly about a tax write off, as he was quite 'well-off', financially-and had little horse knowledge.) One of the FIRST two mares I chose to buy measured EXACTLY 34"; she is still with me at age 26; she produced some of my best horses(none went oversized, to my knowledge, though there were a couple that I 'sweated'!), and is very dear to me!
One of the mares I bought and resold, as I improved my stock, was one I moved to Foundation Oversized. I did not keep her, but not because she was oversized.
I think those new to all this need to realize a couple of things---
First, that one shouldn't count completely on the heights listed on papers--or even that the horse you have now REALLY 'goes back' to' every horse that is listed. There was clearly a good bit of 'guesstimation' of height(or even, wishful thinking, IMO!)--and record-keeping(who was REALLY the sire of who, for instance)was sometimes also VERY 'casual'.Only with the full implementation of PQ'ing will that finally fade, I believe.
One of my personal practices when buying breeding stock that I planned to keep was to SEE at least the dam, and better still, both parents, with my own eyes(and if possible, measure them MYSELF...and I did so with pretty much every one I KEPT for breeding. This practice worked well for me.Anyone breeding miniatures needs to realize, though, that there is ALWAYS the possibility of a 'size surprise', IMO.
I am one who has ALWAYS favored a 'breeding stock', 'appendix', 'foundation oversize' ---division(for the offspring of two LEGAL height parents only)in both registries, and believe they have been foolish and short-sighted to refuse to establish such. Several serious proposals have been put forth over the years--ones with good parameters, such as: such horses may be bred, but ONLY to a provably LEGAL height mate, and then, the resulting offspring MUST be officially measured at the age decreed to be issued PERMANENT papers, and will only be 'fully' accepted in the registry upon that event. This is 'tough' enough that it should satisfy the naysayers, and has basically been proposed. I must add that the success of ANY SUCH PROGRAM would hinge on HONEST AND STRICTLY CORRECT MEASUREMENT, however!!!!!
To me, the terrible irony is that even well-designed proposals for such a division have been ruthlessly shot down, again and again, while at the same time, there seemed to be an increasing 'official sanction' for de facto having clearly OVERSIZED horses allowed to compete in shows, even at the highest level....
(and though my reference and experience here is AMHA, I have no doubt that many of the same issues plague AMHR.)
Margo