Dr. McCullough was previously on the staff at the University of Illinois where she was instrumental in creating the critical care unit. She graduated from the University of Illinois in 1987 and was a general practitioner/emergency veterinarian for 9 years. She returned to the University of Illinois in 1995 and completed two residencies. Dr. McCullough has been boarded in internal medicine since 1998 and in emergency medicine and critical care since 2004. In addition to her critical care duties, Dr. McCullough is in charge of the internship program at VCA Aurora Animal Hospital. She is adjunct professor at the University of Illinois.