Just Zerene is an $800,000 filly who was aiming to qualify for the $2 million Magic Millions 2YO Classic by winning Saturday's Basil Nolan Jnr Handicap.
However, under a local rule in Queensland only 10 two-year-olds are allowed to run from the Eagle Farm 1000m start between August and February.
McEvoy said he was far from pleased when Just Zerene was made a second emergency for Saturday's race and others would feel the same.
“I mean horses are trying to qualify for a Magic Milions. If the start is no good make it 1100m or they could have split the race into two heats,” he said.
McEvoy said he would not a make a decision in the heat of moment about whether to continue with the filly's campaign in the north.
“I will wait until I have calmed down and spoken to the owners. We can also see if there are going to be any scratchings,” he said.