If your dog is trying to vomit and unable to do this or throwing only foam vomit then there is possibility that he is having canine bloat. Bloating in dogs can be painful leading to shaking. During this problem, gases are filled in the stomach after eating and stomach can be twisted that is a life threatening condition. Symptoms of bloat in dogs are
- Unproductive vomiting or foamy vomiting
- Drooling
- Pacing
- Restlessness
- Shaking