Explain to me why would you test brood mares with cobalt products????. I think a controlled "in work" regime would work better however that opens up a different ethical situation. May have to be done to get reliable results but the horses must not race only amongst themselves. I wonder if the owners of the Broodmares used in this study were notified ????. As the industry discovers new substances that can have an effect a horses you see the rise and falls of many participants and there horses. Many of the horses either dont race again or rarely improve on their previous performances once they have been proven positive. I believe these substances damage the vital organs of these horses who have been pressed to their maximum to many times.