In brief, this is an EU funded research project that found that homeopathy protects cows against potential udder infection. Over 100 cows in Switzerland took part in the trial, and results showed that homeopathy gave 9-fold better protection compared to the control groups.
The homeopathy denialists, and homeophobes will undoubtedly claim two things. First, the cows knew they were being treated, so it was just placebo effect! And/or that the quality of the research was not good enough! But then, who cares about what they think. This is just further proof of the power of homeopathy, and so is welcome additional evidence.