Susan O'Brien, DVM

Dr. Susan O’Brien followed her life-long aspirations of becoming a veterinarian when she graduated from the Atlantic Veterinary College in 2010 with a Doctor of Veterinary Medicine degree.  She is a 2006 graduate of Sweet Briar College in Virginia with a Bachelor of Science degree in Biology.

In her final year of veterinary school, Dr. O’Brien completed a rotation in a rural Peruvian village treating dogs, cats, donkeys and horses.  It started a drive to continue philanthropic efforts and volunteerism throughout her career.  

Following veterinary school, Dr. O’Brien completed a year-long extensive internship at a mixed animal practice in her native Ohio.  She stayed on as an associate veterinarian at this practice for two years once she completed the internship in July of 2011.  A lot of her focus during this time was general medicine and emergency care of horses, dogs and cats.  She made the move to Colorado and began working at a small animal veterinary clinic while she developed her business. 

Her inspiration behind Colorado On-Site Veterinary Services was to provide enhanced preventative care of dental maintenance, vaccination protocols, strategic deworming as well as nutritional guidance to maintain optimal health.  She pursued several advanced certifications in the modalities of acupuncture, chiropractic care and laser therapy in order to offer a full array of services to her patients.  Dr. O’Brien is certified in veterinary acupuncture by Medical Acupuncture for Veterinarians.  She is certified in chiropractic care by the International Veterinary Chiropractic Association and the Options for Animals College of Veterinary Chiropractic. 

In her free time, you’ll find her riding, hiking, fishing and enjoying the great state of Colorado with her husband Kenny and daughter Violet.  They share their home four rescue dogs, one cat, and two quarter horses.  

dr susan obrien - colorado onsite vet



Evelyn Iacono, DVM

Dr. Evelyn Iacono comes to Colorado from her hometown of Cincinnati, Ohio. A childhood filled with animals and a passion for science and learning made veterinary medicine a clear career choice.

Dr. Iacono began her veterinary training by shadowing her family’s equine veterinarian in high school and college, Dr. Susan O’Brien. She completed her undergraduate education at Case Western Reserve University in Cleveland, Ohio where she competed on the university basketball team and spent summers continuing her pursuit of veterinary medicine by interning at the Cincinnati Zoo working with elephants and giraffes.

Dr. Iacono received her Doctor of Veterinary Medicine from The Ohio State University College of Veterinary Medicine. During her time at OSU she was able to take part in a course abroad, studying in Thailand where she learned about Thai culture along with veterinary medicine, focusing on elephant care. Also at Ohio State, Dr. Iacono acquired two furry family members, her dog Rumi, and cat, Earl. After graduating from OSU, Dr. Iacono completed a one year mixed animal internship at Alpine Animal Hospital in Carbondale, Colorado.

Professional interests include preventative health care, sports medicine, equine reproductive medicine, and internal medicine.

In her spare time she enjoys hiking, rock climbing, biking, snow sports, and spending time with her friends, both furry and human. She is thrilled to be joining Colorado On-Site Veterinary Services and to be a part of the Eagle County community!

Dr. Evelyn Iacono - colorado onsite vet




Made in America

We are proud Americans at Colorado On-Site Veterinary Services and strive to support products Made in America. Everything from our clippers to our state of the art mouth speculum is sourced right here at home.

Practice Area

Colorado On-Site Veterinary Services is based out of central Eagle County. The practice radius serves the mountain valleys West of and including Silverthorne. Trip fees are based on travel distance, please contact for pricing information.