A n 11-year-old, female spayed, Brittany Spaniel, weighing 22 kg, was referred to the Emergency Service of the Veterinary Medical Teaching Hospital (VMTH) at the University of California, Davis, and hospitalized for evaluation and treatment of acute kidney injury, following ingestion of an unknown amount of ethylene glycol, 3 days earlier. At presentation at the VMTH (day 1), the dog was ambulatory, but lethargic, and overhydrated. The remainder of the physical examination was unremarkable. A CBC revealed normocytic normochromic, nonregenerative anemia (Hct, 29%; reference range [RR], 40-55%). Serum chemistry abnormalities included azotemia (serum creatinine concentration, 8.1 mg/dL; RR, 0.5-1.6 mg/dL; blood urea nitrogen [BUN], 67 mg/dL; RR, 8-21 mg/dL), hyperphosphatemia (13.8 mg/dL; RR, 3.0-6.2 mg/dL), hypocalcemia (8.3 mg/dL; RR, 9.7-11.5 mg/dL), normokalemia (4.97 mmol/L; RR, 3.6-5.3 mmol/L), and metabolic acidosis (serum bicarbonate, 10 mmol/L; RR, 16-26 mmol/L). On urinalysis, specific gravity was 1.009, pH was 5, and occasional calcium oxalate crystals were observed. Urine culture for aerobic and anaerobic bacteria was negative. Abdominal ultrasound examination disclosed normal-sized kidneys with hyperechoic cortices bilaterally, consistent with ethylene glycol intoxication and focal hyperechoic appearance to the mesentery in the right cranial abdominal quadrant suggestive of pancreatitis.Owing to azotemia, clinical signs, and presumed ethylene glycol exposure, hemodialysis was initiated, using standard procedures as established for dogs.1,2 By day 11, clinical signs had resolved with the combination of hemodialysis and symptomatic treatment, and all caloric requirements and medications were provided via a gastrostomy tube placed during initial hospitalization. Renal function, however, did not improve, necessitating continued thrice weekly hemodialysis treatments on an outpatient basis. On the day of discharge (day 11), aluminum hydroxide a was added to the blended diet to provide 84 mg/kg/d in order to control the hyperphosphatemia. This dosage was increased to 126 mg/kg/d on day 22, because the serum phosphorus concentration exceeded the target range (o6 mg/dL). On day 36, erythropoietin b therapy was initiated at 100 U/kg thrice weekly, SC in combination with iron dextran c supplementation at 10 mg/kg IM every 3 weeks.The dog remained stable for the next 26 days on hemodialysis but no improvement in the kidney function was noticed. Mean serum creatinine and BUN concentrations before each dialysis treatment were 6.8 and 75 mg/dL, respectively. On day 62, lethargy and a decreased activity were noted by the owners. Both conditions worsened progressively to obtundation and complete recumbency by day 70. Neurologic examination revealed an inconsistent menace response, normal cranial reflexes, tetraparesis, reduced patellar reflexes in the hind limbs, and markedly reduced withdrawal reflexes in all 4 limbs. On the basis of these findings, the neurologic deficits were localized as diffuse cerebral and periph...