Bacterial liver parenchymal infections in dogs are rarely documented, and their imaging characteristics are scarce in the veterinary literature, especially in Computed Tomography (CT). This retrospective multicentric study aimed to describe the CT characteristics of parenchymal bacterial liver infection and abscessation in dogs and compare them with the human literature. Twenty dogs met the inclusion criteria. All dogs, except one, showed discrete hepatic lesions consistent with pyogenic liver abscess (19/20). A single case showed diffuse liver changes, which was diagnosed with granulomatous bacterial hepatitis (1/20). Multifocal lesions were associated with the presence of abdominal pain (p = 0.023). CT characteristics of pyogenic liver abscesses in our study resemble those described in the human literature, with multifocal (14/19) or single (5/19), round or ovoid (19/19), hypoattenuating hepatic lesions, which are better visualised in post-contrast images. Pyogenic liver abscesses can also show features such as the “cluster sign” (8/19), transient arterial segmental enhancement (6/10), rim enhancement (6/19), and intralesional gas (4/19). Additional CT findings, such as local lymphadenomegaly (18/20), peritoneal fat stranding (14/20), and peritoneal fluid (13/20), are also commonly observed.

An 11‐year‐old female British blue cat was referred for investigation of acute onset vomiting and marked abdominal enlargement. Diagnostic investigations confirmed a large volume of free gas within the abdomen and changes highly suspicious of an ulcerative gastric lesion. Exploratory surgery confirmed the presence of a perforated gastric ulcer and histological analysis showed only associated inflammatory change. The ulcerated lesions were resected, and the cat recovered rapidly with complete resolution of clinical signs. Spontaneous gastric rupture due complete perforation of an ulcer is rarely reported in cats. The vast majority of reported cases present with septic peritonitis, and the majority are subsequently diagnosed with neoplastic disease or a chronic inflammatory aetiology. The cat reported here had no evidence of septic peritonitis, and the authors feel a final diagnosis of idiopathic gastric ulceration is most likely.