If your pug is vomiting at least three times in one hour or 8 times in a days then you should take her to vet for proper diagnosis and treatment. Once or twice vomiting in dogs without other signs of illness like diarrhea, loss of appetite etc is not a matter of great concern. If she is throwing persistently then stop giving her all foods and take her to vet. Persistent vomiting in dogs can be due to following conditions and diseases.
1. Gastritis
2. Excess gastric acidity
3. Overeating
4. Eating rapidly
5. Exercise after taking meals
6. Food allergies
7. Changes in diet
8. Eating of grass or garbage
9. Gastrointestinal obstruction
10. Intestinal parasites
11. Intestinal and gastric tumors
12. Liver disease Kidney disease
13. Heat stroke
14. Middle ear infections
15. Anxiety & Stress
1. Gastritis
2. Excess gastric acidity
3. Overeating
4. Eating rapidly
5. Exercise after taking meals
6. Food allergies
7. Changes in diet
8. Eating of grass or garbage
9. Gastrointestinal obstruction
10. Intestinal parasites
11. Intestinal and gastric tumors
12. Liver disease Kidney disease
13. Heat stroke
14. Middle ear infections
15. Anxiety & Stress