Liz Buchanan BVSc MRCVS
Hello - I am going to answer that again, as my first response was unclear. First, there are many possible explanations for what you describe, ranging from pancreatitis to regurgination, to lung and heart problems, to laryngeal foreign bodies, lumps and polyps, viral infection, to neurological defecits and even rare manifestations of thyroid disease. A full examination including listening to the chest, feeling the area and neurological checks will hopefully have left your vet with a list of suspicions / possibilities (differentials) and they will be trying to rule each out in turn. Chosing the best diagnostic test to start with is difficut- your vet will want to rule out the more urgent possibilities, but also the most likely ones first and potentially prioritise the easiest and least expensive tests to some extent. These rarely coincide in one investigation eg radiography is easy to perform and soft tissue and gas can be distinguished easily (useful in the neck); it can help to detect heart, lung and airway changes. However, a peice of grass in the airway or a damaged nerve would be less visible using radiography, in which case endoscopy might be more useful. However, endoscopy sometimes requires a specialist.