The Bar-Pulling Task (IMAGE) University of Veterinary Medicine -- Vienna Caption The donor dog (right) can pull a tray and donate food to the receiver-dog (left). Credit (Photo: Mylène Quervel-Chaumette/Vetmeduni Vienna) Usage Restrictions The photo may only be used in the context of this press release. 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.