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Originally Posted by Ellie May  She may need to go on an IV at the vet tonight.
Dehydration can lead to electrolyte imbalance an then cardia arrest and it sounds like their is nothing you can do at home to stop this from happening. 
What did she eat yesterday?
Shakiness would probably either be pain or maybe low blood sugar.
Even if you get her to eat, she most likely won't keep it down if she can't keep down liquids.
If she can do liquids, how about pedialyte? |
You need to get her back to the vet or ER asap. Toy bred dogs dehydrate quickly and the electrolyte imbalance can cause cardiac arrest as Crystal said. She needs IV fluids to keep her nourished while her digestive tract rests.