Dog (IMAGE) PLOS Caption Diet and prior training show no impact on cognitive decline in aging pet dogs. Credit Clever Dog Lab, Messerli Research Institute, University of Veterinary Medicine, Vienna, Austria Usage Restrictions CC BY: Redistribution permitted with credit. 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.