[Ellie May]

It may be too late for a Spec cPL. A Vit B check can be done anytime. A bile acids test can be done anytime (to check liver function. Although in this case it would be more of a formality. Vomiting blood sounds very intestinal. Could do an xray, maybe even a barium swallow to see things better in there. An ileus can partially block them. I mean, it may be IBD, but IBD can be secondary to something else that needs to be treated. If your vet doesn't want to go further, an internist may be able to help.