Dr Jill Haley with Spratt's dog cake (IMAGE) Canterbury Museum Caption Dr Jill Haley, the study's lead author, holds a Spratt's dog cake fragment from Canterbury Museum's collection. Credit Canterbury Museum 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.