Irish racehorse trainers and breeders fear a Brexit that impedes the free movement of animals could threaten its success on the track and position as Europe's largest producer of thoroughbreds.
Ireland is widely considered the European Union member most at risk from next door Britain's exit from the bloc, potentially cutting its land route to mainland Europe for exports and hindering trade with its key UK market.
Few sectors are as integrated as the two islands' racing and breeding industries that, according to Horse Racing Ireland, the national authority for thoroughbred racing, contribute over 1 billion euros a year to Ireland's 189-billion-euro economy.
"Are they going to say that you have to have a sealed horse box? Has anyone thought about these things? Horses can't do that, you can't do that. By law they are only allowed to do so many hours and then they have to rest," she said.
"We've talked about it in the trainers association and nobody knows. It's now damage limitation more than anything else...No one has a plan."