Our field reporter reported the following:
"Main defender, the favorite in the one race, failed a TCO2 test and was scratched. And so the connections of the horse got together. There was about 15 of them.
"And they blockaded the runway where the horses go down to go onto the track and refused to move. And subsequently, the race meeting had to be abandoned."
The following link is to an extensive article on TC02 testing from OFF THE RECORD. The article was written by Charl Pretorius.
The TC02 Testing Conundrum