Aidan O'Brien and Coolmore Stud among 10 suing Glanbia over horse feed

It is alleged that batches of "GAIN" racehorse cubes supplied by Glanbia were contaminated with an performance enhancer Zilpaterol

As a result of the contaminated feed, the plaintiffs, including trainer Aidan O'Brien (pictured), had no option but to withdraw their horses from Longchamp and therefore suffered the loss of the opportunity to race and win prize money there. File photo: Brian Lawless/PA

Horse trainer Aidan O'Brien, his son Donnacha, Coolmore Stud and Ballydoyle Racing, and a number of other companies, are suing Glanbia for €30m over alleged contaminated feed which forced the withdrawal of a number of horses from the Longchamp Racing festival in France in 2020, the Commercial Court has heard.

Glanbia denies it is responsible for the alleged losses and will be seeking an indemnity from a third party which it says is entirely responsible for losses resulting in contaminated feed, the court heard.