Lions playing (IMAGE) Cell Press Caption These photos show lionesses playing with their toy pumpkin after oxytocin treatment. Credit Jessica Burkhart Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.