Dogs Know a Left-Sided Wag from a Right (image) Cell Press Caption You might think a wagging tail is a wagging tail, but for dogs there is more to it than that. Dogs recognize and respond differently when their fellow canines wag to the right than they do when they wag to the left. The findings reported in the Cell Press journal Current Biology on Oct. 31 show that dogs, like humans, have asymmetrically organized brains, with the left and right sides playing different roles. Credit Siniscalchi et al. Usage Restrictions Credit Required 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.