Cocker Spaniel (IMAGE) University of Veterinary Medicine -- Vienna Caption MDCK (Madin-Darby canine kidney) cell lines derived of an english cocker spaniel are used in cancer research to determine the molecular basis of malignancies in dogs. Credit (Photo: Susanna Berger/Vetmeduni Vienna) Usage Restrictions None 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.