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Where is the problem in the secondary GI system?

Secondary GI causes of vomiting of most relevance for Muriel include:

 Hepatic disease

 Hypoadrenocorticism

 Chronic (but not acute) pancreatitis

 Electrolyte perturbations due to various disorders (calcium, potassium).

Because polyuria and polydipsia are not features in this case (assuming the owner’s history is correct), other conditions, which are less likely (but not excluded yet), would be:

 Renal disease

 Diabetic ketoacidosis.

Primary GI disease is less likely (although it cannot be completely excluded just yet) and will be investigated if there is no evidence for secondary GI disease. GI neoplasia or inflammatory bowel disease would be the most likely differentials if primary GI disease is present.