Thank you for waiting. You are dealing with a medical emergency called gastro-intestinal stasis. When a rabbit stops eating completely and/or stops passing droppings, GI stasis has developed. That is an emergency, and she must be seen by a vet as soon as possible.
In the meantime, continue to give water by syringe. Pedialyte (made for human infants and available in discount stores and pharmacies) is another good addition. Another product for human infants that I recommend is liquid simethicone. Also give it by syringe. It breaks up any gas in the stomach, making it easier to pass. There's no certain amount to give - it's nontoxic.
You can also turn your rabbit over on her back on your lap and gently massage her stomach. That, too, can sometimes get things moving.
Here's a site where you can read more about GI stasis and additional steps you can take:
The above steps may help, or they may not. Many times, a vet can give a gut motility drug, such as metaclopramide, and that will solve the problem. If some kind of blockage is causing the problem, surgery can be needed. I've raised rabbits for many years, and I don't wait with GI stasis or pre-stasis symptoms. I've had rabbits stop eating and within three hours be dead. My first recommendation for you is to see a vet. Here is where you can find a rabbit vet:
It's best to try to find a rabbit vet because some vets who treat mainly dogs and cats aren't familiar with rabbits' sensitivities to certain medications. Many are not even aware of the condition (GI stasis) and do not know how to treat it.
If you have more questions, just let me know. I hope Babs will be fine.
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