A 1‐day‐old female alpaca cria presented to Cornell University's large animal internal medicine service for abdominal pain. On presentation, the cria appeared septic with hyperemic mucous membranes and marked abdominal distention. Abdominal ultrasound showed distended, hypomotile loops of small intestine with increased anechoic free peritoneal fluid. Abdominal radiographs with a barium enema showed gas distended proximal colon and marked segmental narrowing of the descending colon. Abdominal exploratory surgery revealed a meconium‐filled blind end in the proximal loop of the ascending colon and a collapsed, empty spiral and descending colon, consistent with a diagnosis of atresia coli. The location of this cria's atresia coli differed in location from the more commonly reported atretic spiral colon lesions seen in calves and was associated with poor surgical prognosis. This species variation is an important consideration prior to surgery and may help inform surgical decisions for those faced with similar cases in the future.

Postpartum dairy cows undergo a period of energy deficit that can lead to excessive lipolysis and formation of ketone bodies such as β-hydroxybutyrate (BHB). Cows that are hyperketonemic (HYK; blood [BHB] ≥1.2mmol/L) are at greater risk of adverse events during early lactation. Although 300 ml of oral propylene glycol (PG) has been shown to reduce these negative effects, the efficacy of intravenous (IV) dextrose is unclear. Our objective was to investigate the impact of IV dextrose as an adjunct therapy to PG on HYK resolution, disease incidence, and milk yield.