Interesting article, thanks. ..One panelist in the TVG video said - maybe the only way to monitor it as well as leveling the playing field is by banning it altogether.

 IMO,  excessive prescriptions are making doctors weaker diagnosticians - and making trainers weaker horsemen....and making drug companies rich.

From your article...

In his early years as a trainer, Mel Stute would regularly blow out his horses two or three furlongs the morning of the race....

“It might take the congestion out of their lungs,” he said. Did it prevent bleeding? “You hoped so, but you went by feel.”

Nerud also offered a simpler strategy for treating the ailment: “Keep them fat and happy, and don’t work them too hard. Give them the chance to heal up, and usually, they would.”