please keep in mind that the usda has the right, at a horse show, to inspect your horses from the time you pull onto the grounds. they can stop and enter your trailer and walk thru the barns at a show to check for any signs of chemical use. this alone has gotten quite a few "big barns" to change the way they approach the training of the TWH.
as far as pads....check the study that auburn university did on the padded horse over the course of 8 years. they concluded that pads do not adversely affect the horses joints, legs, muscles, ect.
just the fact that there is discussion about people taking former padded horses and showing them in flat shod classes and/or trail riding is proof that the horse is not suffering any permanent damage from the pads.
now...for the chains.....as far as i know, i have never seen any horse with "bigger" chains on during training as opposed to at a show.
the trainers use a VERY strict procedure to insure that the chains (rollers) do not hurt the horses feet and hair. and they work with the horse to see what weight chain provides the best action for that horse.
putting 16oz of chain on a horse that only needs 4 is foolish and only increases the chances of rubbing the hair off and possibly causing a "scar"
one of my horses really comes alive as soon as you put a chain on him.
the funny part is that it could be something as simple as a plastic dime store kids bracelet weighing next to nothing but he knows its there and trys to pick his feet up and toss his feet out to throw it off.....its all a matter of giving the horse something to make him concentrate on his feet....take them off and he acts like a goofball again.....but in the ring or in training, he has never had any more than a 4oz chain on.
THE most important thing when looking for or training a TWH for the show ring right now is CLEAN FEET....no rubs, scars, cuts, abrasions.....nothing!!
because when that horse goes up to get inspected, every trainer knows that if they get a bad call, they could get suspended and fined. and that affects their ability to make a living.......its not a hobby for a LOT of these guys.....its a living. and a lot of them are scared.
are there still guys out there that try to push it....yup. but i did see quite a few horses at this years celebration that either requested to or were asked to be "excused" because their horse was presenting a "bad image".
the industry had gotten out of control with everyone trying to outdo everyone else but now with stricter inspection policies, things are really starting to get to where the horse has to naturally perform rather than "enhanced" performances.
there is something else i started to notice in the past 2 seasons.....the horses really seem to be a lot happier