Golden retriever age 6months watery motion vomiting

Gastric dialatation with gaseous distention is noticed.VD with little rt oblique position is requested to rule out any stomach displacement. The pyloric entrance is narrowed & inflammed.watery motions can be without feed,not of concern;but vomition is. Type of vomition?postprandial ie half hr after feed/water or, immediately or, 5-6 hrs?Feeding patter? A reversible disorder with medicinal therapy it seems.