Old dog (IMAGE) Eötvös Loránd University Caption Does size difference also impact how dogs age in terms of behavior and cognitive abilities? Credit Photo: Eniko Kubinyi / Department of Ethology at Eötvös Loránd University Usage Restrictions Credit must be given License Original 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.