Bimeda, a Dublin-based animal pharmaceutical company, is being sued by a larger US rival over the colour of its formula for treating worms. Elanco, a New York-listed firm that used to be part of Eli Lilly, filed a lawsuit against the Irish company in Illinois, alleging trademark infringement and deceptive practices. It alleges that Bimeda copied Elanco’s product in the appearance of its purple liquid and the marketing of the medication. Bimeda, which is owned by the Tierney family and has about €37 million in annual turnover, released MoxiSolv, an antiparasitic solution for treating worms in animals, in August. The…