Two Simple, is there any point in trying to get you to listen to anyone other than yourself? I submit that you don’t know quite as much about these horses as you think you do.
For one, these horses aren’t all receiving hock injections. In fact, very few of them are receiving hock injections. In the FEI classes, there is no tolerance for any medication at all, and the people who have these horses don’t keep them if they need alot of expensive ‘help’ to keep going. Why? BEcause it’s a small world and its a long road to the FEI, and the information gets around that small world very quickly. Horse xyz is being medicated, don’t buy him. Sell him to an American 
I am not sure what connections you have to Dr. Moller and the other European dressage trainers who have these horses, or how much time you have spent working in their barns, but I suspect you have no connection and have spent no time in their barns.
I very, very seriously doubt that you are aware of what treatment these horses do or don’t get.
I would very seriously doubt that these horses are in work at all, in fact, certainly nothing like what Americans do.
They get ridden a little bit, yes. But most likely, they have been under saddle for a total of about 6 weeks when they go to these things. They have a saddle put on them at 2 1/2, they walk around. Then they go out for the winter; in fact, they are very rarely even very halter broke at 2 1/2, in the European tradition, which adamantly insists they need to be left alone to be horses. No longeing, no round penning, no long lining, barely halter broke. Go to one of these farms some time if you think you know so much about how these horses are handled, in general, they are handled NOT, lol.
At 3 or 3 1/2, when they are basically as wild as little furry indians, some brave soul gets on them, and the laughs ensue and the riders fly through the air while the very happy, very athletic horses have their fun.
A friend of mine got a 3 yr old from a big auction. Imagine her shock when she brought him home, ‘This thing is totally wild!’ Frankly the animal was EXTREMELY happy, and not at all broke. It thought the saddle and bridle being on was time to unlease all his most EXTREMELY happy moments.
The auction horses are worked on a straight line, and a little track is dug for them because they don’t know how to turn yet…LOL…that has changed little even recently, and the whole reason is because these horses AREN’T worked much young.
I can say one thing for sure; they are not ‘confirmed’ or ‘trained’ in any sense of the word at this point, by any stretch of the imagination. If yiou had ever sat on one, you’d know that. These horses get very, very little work at all before these things.
What they are doing is completely up to the skill of the rider, who has probably had an hour or two to get to know the horse; at best, a couple weeks and a dozen or so rides. It was from European dressage trainers that I got all the advice not to longe, not to work, not to break my youngster early, not to overdo with him at a young age.
What you see here, is completely raw talent. These horses aren’t at all ‘broke’ like American dressage horses for amateurs are expected to be, and they have very little training.
The flavor of a wine doesn’t come from the wine being manipulated or fermented or fiddled with. The flavor of a wine comes from the grape itself. And that is exactly what you are seeing here - pure juice.
They definitely don’t have a saddle on them nor are they being longed at 1 1/2 years old, like your horse, which you posted pictures of here last year, at 1 1/2, on a longe line, with a saddle on. In fact, recalling that, it’s highly ironic to me that you are complaining about these horses being worked too young.
Sorry but I don’t ride 2 year olds. I don’t ride 2 1/2 year olds. I barely ride 3 year olds. Barely. I get so tired of seeing all these horses on hock injections as babies. Just talked to a QH girl the other day who is injecting her 3 year old already. She started him at 2 in western pleasure. She thinks its normal. Well, its not normal.