But all dogs do express themselves with tail movement. (mnn.com)
The tail muscle and nerves facilitate tail movement and play a role in bowel control. (soonervet.net)
In what is thought to be among the first studies of frustration in free - ranging animals, the findings, published online in the Journal of Comparative Psychology, suggest that animal tail movements reveal their emotional states, particularly the exasperation they feel when stymied during problem - solving tasks. (sciencedaily.com)