Cummings School of Veterinary Medicine at Tufts University
Orla Mahony


Dr. Orla Mahony is a small animal internist with a special interest in endocrinology. She teaches students in their senior year during their small animal medicine rotations, and is board certified by both the American and European Colleges of Veterinary Internal Medicine.

Growing up in Ireland as the daughter of a beef cattle rancher, Dr.Mahoney says she always wanted to be a veterinarian. After attending University College in Dublin for veterinary training and an internship,Dr. Mahoney moved to England to work in small animal practice. She wanted to specialize further and was accepted into a residency program at Tufts, where she has worked since 1994.

Since then, several cases stand out. Scoping an anaconda was an experience I will never forget! she says. More recently, she managed the clinical care for a dog with myasthenia gravis and a thymoma. The dog required a team of doctors, residents, students and technicians from surgery, oncology, anesthesia, neurology and intensive care to remove her thymic tumor and get her through a challenging post-operative recovery. Dr. Mahoney adds that, further phenomenal care at home has allowed her to feel like her old self.

I love solving tough cases, and I love teaching. To have a job that allows me to work with people who love animals is a privilege, she says. In her free time, she enjoys volunteering at her daughter's school.


  • MVB - University College Dublin, Ireland - 1987

Board Certification

  1. Hall TC, Mahony OM, Freeman LM, Rozanski EA. Effects of diet on glucose control in cats with diabetes mellitus treated with twice daily insulin glargine. JFMS 2009; 11(2) 125-130.
  2. Bach JF, Mahony OM, Tidwell AS, Rush JE. Brain abscess and bacterial endocarditis in a Kerry Blue Terrier with a history of immune-mediated thrombocytopenia. JVECCS 2007; 17(4) 409-415.
  3. Hecht S, Penninck DG, Mahony OM, King R, Rand WM. Relationship of pancreatic duct dilation to age and clinical findings in cats. Vet Radiology and Ultrasound 2006; 47(3):287-294.
  4. Weaver KE, Rozanski EA, Mahony OM, Chan D, Freeman LM. Use of glargine and lente insulins in cats with diabetes mellitus. JVIM 2006; 20(2):234-238.

General Research Interests

  • Endocrinology

Selected Research Projects

  • The effect of isoflavones on thyroid function of normal cats.
  • Ultrasonographic appearance of the pancreas in older cats.

Research Interests by Area

Spontaneous Animal Disease Models
  • Canine hypothyroidism, feline hyperthyroidism, Cushing's, Addison's, diabetes mellitus

Research Interests by Organ System and Disease

  • Canine hypoadrenocorticism, hyperadrenocorticism, and diabetes mellitus. Feline insulin resistance and diabetes mellitus.