I am loathe to putting anything on this forum that I cannot back up but on the presence of boldenone in a horse, I found something somewhere on the net last night which for the life of me I can't find tonight but if you would take me at my word it described that the level that horses are tested at gives a very liberal buffer between what is produced naturally against what is introduced to the animal by other means. In other words if the sample exceeds the accepted level there is a high probability that it was not produced naturally.

Or maybe it was just an exceptionally well conformed filly that may have caught Machs eye that night that might have sent his juices into overdrive.