You should be very much concerned about your dog's condition consistent foamy vomiting in dogs can leads to life threatening conditions. If your dog is throwing white foam occasionally then no need to worry but on consistent basis, it is harmful. This foamy vomiting can be due to bloat that can very serious complication if not treated. This condition can cause stomach twisting by putting pressure on the GI tract. Symptoms of bloat are
- Restlessness
- Pacing
- White foamy or unproductive vomiting
- Drooling