Aidan O'Brien and his son Donnacha are among a group of plaintiffs associated with Ballydoyle and Coolmore who issued legal proceedings against animal feed supplier Glanbia over the contaminated feed debacle on G1 Prix de l'Arc de Triomphe weekend in 2020. The multi-million euro lawsuit was initiated this week and comes after O'Brien's runners could not take part at the Arc meeting due to positive test results from a French laboratory for the prohibited performance enhancing substance Zilpaterol. None of the five horses who tested positive were trained by O'Brien...