A. Your dog should been seen by a vet to determine the right medications to prescribe. If you are worried about a bacterial infection and think this is serious I would go to the vet right away.
Yellow vomit is usually bile.
I would try fasting her for 24 hours. Water only. Then start her on a bland diet. Take some chicken or ground beef (unseasoned) and boil it until cooked. Use the water to make some plain white rice and only feed her this until the vomiting stops. Keep her on this for a day or so and slowly re-introduce her food over the next couple days, weaning her off the bland diet. If his condition gets worse or she stops drinking then go to a vet
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