An investigation has alleged that workers at an award-winning dairy farm supplying major British retailers, including Tesco and dairy producer Müller, punched, kicked and stubbed cigarettes out on cows. The claims raise serious animal welfare concerns about conditions at a farm that had previously been recognised for its standards, and are likely to prompt scrutiny of supply chain oversight by the retailers and producers involved.

Full details of the investigation, including how the alleged mistreatment was uncovered and any response from the farm, Tesco or Müller, were not available in the provided article text. The piece appears to originate from an undercover or whistleblower-style report into livestock treatment at the dairy operation.