“…Certain breeds such as Friesians (two out of four cases described here) are more predisposed to develop gastric impactions and gastric ruptures. 23,56 Even though the Friesian horses in this case series were not diagnosed with stomach impaction, it is not possible to rule out that the full-thickness perforations found in these two cases were induced by previous impactions. In one of them, histopathology revealed chronic changes and altered anatomy of the layers, with lack of epithelium and muscle layers, which some authors consider to be an adaptation to chronic distension.…”