Waiting for an outcome: Trainer Peter Moody speaks to the media after his hearing.Waiting for an outcome: Trainer Peter Moody speaks to the media after his hearing. Photo: Getty Images

The veterinarian who admitted selling cobalt to two thoroughbred trainers was an “admitted liar” whose evidence was questionable, a Racing Victoria hearing has been told.

High-profile trainers Mark Kavanagh and Danny O’Brien appeared before a panel of stewards on Wednesday afternoon, forced to make a case for why they should not be stood down while they await trial on doping charges.