She might have eaten something spoiled that has cause that. withhold food for 8 hours then offer her boiled boneless chicken and rice every 6 hours in small portions. if she is eating and not vomiting, continue with this diet for 2 days.
After 2 days, you can put her back gradually on her normal food.
If he continues vomiting or is not eating, take her to the vet to get treatment.
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