Holstein Neef (IMAGE) Penn State Caption Lead researcher Pedro Henrique Vilela Carvalho talks to dairy farmers about the benefits of hormone implants in Holstein steers raised for beef. Credit Penn State Usage Restrictions Non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.