How is she now?
I would let her lick an ice cube and give her a tiny bit of nutrical. see how that sits in her tummy, then give her a teaspoon of baby rice cereal made with warm water. If she won't eat it, add a little chicken baby food.
It sounds like she ate something and needed to empty her stomach. Now she is vomiting bile and she may need a little food in there to make her stop.
Cat poop/litter will definitely do this.
Have you talked to the vet? |