8. Pacing, restlessness, unproductive retching.
When a dog is pacing and unable to settle down, it could mean that he is uncomfortable or in pain. One serious condition where these symptoms can arise is Gastric Dilatation Volvulus (GDV), also known as bloat. GDV is often characterized by a dog trying to vomit but bringing nothing up.
Bloat is a serious condition that occurs most often in large breed dogs, as well as those with a deep chest.