An appeal is set to be launched after British runner Shes Perfect was demoted to second having finished first past the post in the French 1000 Guineas.
Jockey Kieran Shoemark finished a nose in front of favourite Zarigana in the Classic at ParisLongchamp on Sunday.
But French officials ruled the filly, trained by Charlie Fellowes in Newmarket, was guilty of interference.
Basher Watts, whose racing syndicate own the horse, called the decision "farcical" and questioned the ride on the promoted winner.
"The only interference that they have deemed worthy against Shes Perfect was just before the furlong marker, we drift to our left and that right there is the only thing she's done wrong," he said.
"We are appealing. Of course we're appealing. In my opinion it's a farcical decision. When they showed me what it was for, it was laughable."
It would have been a first top-level Group One winner for Fellowes and a lift for Shoemark, who lost the job as number one rider for trainers John and Thady Gosden after finishing second eight days earlier on Field Of Gold in the 2000 Guineas at Newmarket.
Watts initially celebrated enthusiastically with syndicate members.
