The investigation by a British feed company after positive morphine test results in five thoroughbred racehorses has extended to a supplier.
British feed firm Dodson & Horrell said the investigation was currently focusing on possible component contamination affecting Alfalfa Oil Plus.
The company said a thorough investigation was taking place with the supplier of the component to assess how any contamination may have occurred.
“Preliminary investigations suggest that any contamination of this component product did not occur at Dodson & Horrell’s site,” the company said.
It said it had recalled batch numbers week 20-28 of Alfalfa Oil Plus as a precautionary measure.
“No positive test results have been recorded in any other Dodson & Horrell product currently in the market,” it added.
“From information currently available to us, it appears that any contamination may have come from poppy seeds that occur naturally in the environment.
It said naturally occurring prohibited substances, known as Nops, are either naturally present within certain feed ingredients or occur as a result of inadvertent cross-contamination during processing, transport or storage.
The British Horseracing Authority recently confirmed five positive morphine test results in thoroughbred racehorses, and said it could not rule out more.
Buckingham Palace has since confirmed that one of the horses was the Queen’s race mare, Estimate.