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Hello. Thanks for the question.
I would do some x-rays at this point to look for an obstruction. If she's obstructed, then surgery will be needed to relieve the obstruction. If the x-rays are clean, then I would hospitalize her on IV fluids and put a tube into the nose down to the stomach to start trickle feeding a protein dense liquid (clinicare). This will get the gut moving and hopefully stimulate her appetite.
If she continues to vomit with anti-nausea meds and trickle feeding, then I would do an exploratory surgery to look for an obstruction or mass or IBD (inflammatory bowel disease) that may not show up on x-rays. If nothing is found at surgery, we take biopsy samples to tell for sure what's going on in the gut.
I hope this helps, let me know if you have any other questions.