After slogging through whole thread all I can say is Poor Horse. Not even considering the original post and horse;s health issues someone should have spoken to the buyer that a green OTTB is not ideal for a novice rider.
Many years ago while looking to purchase my first horse I also wanted to buy an OTTB and believed the horse and I could learn together. Fortunately my riding teacher explained to me why this was not a good idea.
This poor horse had a miserable life.Afer being poor from illness, gets irregular exercise from problably not a good rider, goes to a “cowboy:” to set him straight, ends up with Strangles and then probably ended up with kill buyer. So very, very sad.