A new rule requires trainers of racehorses claimed at Maryland’s Laurel Park must now report any joint injections administered to the animals in the weeks preceding the race.

Georganne Hale, vice president of racing at Laurel Park, said the new rule require trainers to inform state veterinarians about any joint injections a horse receives in the 30 days before he’s claimed, as well as which joint received the injection and what medication was used. The rule took effect on Jan. 1.

“They’re still working out the bugs,” she said.

Hale said the new rule represents another effort to make horse racing more transparent, and “it’s also good for the horses