Therapy Dog (image) University of Veterinary Medicine -- Vienna Caption Therapy dogs must have a high tolerance level towards people and animals. Credit Photo: Gerhard Koller Usage Restrictions This photo may only be used in the context of the press release. 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.