When approached by the Herald, Harris said he "vehemently" denies the allegations and will be fighting the charge.
"They have charged me in relation to allegations over whether I did enough with a sick horse," he said.
"I vehemently deny this and basically because the matter is with the JCA [Judicial Control Authority] I can't say anything more than that."
The Racing Integrity Board, which took over the functions of the Racing Integrity Unit and the Judicial Control Authority for Racing last year, says they encourage anyone to come forward with any concerns over animal welfare.
"We would encourage anyone with information about animal welfare concerns to bring them forward to us," Clement said.