Open 8:00 am to 5:00 pm Monday through Friday

Overnight care is available at our Congress Street campus Monday through Friday. 

Overnight and weekend care is available 7 days a week at the Warren Avenue campus.

      2255 Congress Street
      Portland ME 04102

      739 Warren Avenue
      Portland ME 04103

Locations for Services

Contact Us

(207) 780-0271
2255 Congress Street
Portland, Maine 04102
739 Warren Avenue
Portland, ME 04103

fax: 207-780-0272
email: petvet@prtlvet.com

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You are here: Veterinarians

Our Veterinary Specialists

Veterinary Specialists are veterinarians who obtain extensive, lengthy post-graduate training (typically four years beyond veterinary school) and experience. They must then pass a credential review and a rigorous examination process by the individual specialty board. Only when the veterinarian has successfully satisfied all requirements of the respective specialty board can he or she becomes "board certified" to practice that specialty. The American Veterinary Medical Association recognizes twenty-one specialty areas.  Please click on any name to meet our specialists.
DVM, MA, Diplomate American College of Veterinary Internal Medicine

    * Bachelor of Science Worcester Polytechnic Institute, Master of Science (pharmacology) Mount Sinai School of Medicine & Doctorate of Veterinary Medicine - Tufts University School of Veterinary Medicine
    * Board Certification - American College of Veterinary Internal Medicine
    * Membership & organizations: AVMA, VCS, MVMA, AVLA, AAHA

DVM, Diplomate American College of Veterinary Internal Medicine

    * Bachelor of Science, Nova Scotia Agricultural College; Doctorate of Veterinary Medicine Atlantic Veterinary College, University of Prince Edward Island
    * Board Certification - American College of Veterinary Internal Medicine

Kristen Berdan, DVM, Diplomate American Board of Veterinary Practitioners
Dr. Kristen Berdan practices canine/feline medicine. She has lived all over the country over the years, including Maine, Texas, Ohio, California and New Jersey. She became a veterinarian due to its perfect blending of her interest in science and her fondness for animals. Dr. Berdan received her undergraduate BS Biomedical Science degree from Texas A&M University, and her veterinary degree from The Ohio State University College of Veterinary Medicine. Dr. Berdan completed her residency at Portland Veterinary Specialists, and was awarded board certification by the American Board of Veterinary Practitioners. Dr. Berdan enjoys her work, making pets feel better and helping them to stay healthy. Her blend of work in internal medicine involves diagnostic testing such as ultrasonography, and developing treatment plans for systemic diseases. Her work in general practice involves emergency care, preventative medicine and helping owners provide good quality of life for their companion animals. Dr. Berdan is married with two daughters, and has two cats. She likes spending time at home in her role as family caterer, events planner and travel agent, enjoying all the fun that life in Maine has to offer.
DVM, Diplomate American College of Veterinary Internal Medicine in Oncology.
    * Bachelor of Arts at Quinnipiac College, Hamden CT. Doctorate of Veterinary Medicine, University of Minnesota. Residency at Purdue University.
   * Board certification, American College of Veterinary Internal Medicine in Oncology.

Cory Mosunic, DVM, MS, DACVO

Dr. Cory Mosunic graduated from Tufts University Veterinary School in 1999. In 2000, she completed an internship in Small Animal Medicine and Surgery at Angell Memorial Animal Hospital. She received her Master’s Degree in Veterinary Ocular Pathology from the University of Georgia in 2003 and went on to complete her residency in ophthalmology at the University of Georgia College of Veterinary Medicine in 2005. Dr. Mosunic received board certification and was inducted as a Diplomate into the American College of Veterinary Ophthalmologists in 2005.

 DVM, Diplomate American College of Veterinary Surgeons. 
   * DVM from the University of Illinois in 1997, internship at Angell Memorial Animal Hospital in Boston.  Performed two years of emergency surgical and medical practice prior to her surgical residency program at Michigan State University.
   * Board Certification- American College of Veterinary Surgeons.

  * Bachelor of Arts - Bowdoin College, Master of Science- University of Connecticut, Doctorate of Veterinary Medicine- Tufts University School of Veterinary Medicine. Previously certified by the American Board of Veterinary Practitioners.

April Guille, DVM, DACVS
Dr. Guille is a board certified veterinary surgeon. She is originally from New Hampshire and has returned there to raise her family. Dr. Guille decided to become a veterinarian because it was the perfect blend between two of her very strong interests—medicine and animal welfare. Dr. Guille attended veterinary school at The Ohio State University. She continued her advanced training with a general internship in New Jersey, a surgical internship in Texas, and a three year surgical residency in Pennsylvania. Dr. Guille spends her day diagnosing and treating surgical illnesses. She loves being a surgeon because she can take an animal that is suffering from a problem, whether it is a cruciate tear, an abdominal tumor, or a fractured leg, and dramatically improve the animal’s quality of life through surgery. It is such a wonderful feeling to be able to do that for people’s pets. Dr. Guille lives with her husband and their two children. Her dog, Noelle, was adopted by Dr. Guille during her surgical internship and has kept her busy with her host of orthopedic issues. Three cats also grace the home with their presence. Dr. Guille loves spending time outdoors. She goes camping with her family and loves nothing better than to spend a day hiking in the White Mountains in New Hampshire. In the winter, cross country and downhill skiing are at the top of her list. Dr. Guille and her husband have also spent many years renovating their house that was originally built in the 1890s.
DVM, Diplomate American College of Veterinary Internal Medicine in Cardiology

    * Doctorate of Veterinary Medicine from Cornell University, College of Veterinary Medicine.
    * Emergency and Critical Care internship at Tufts University School of Veterinary Medicine.
    * Between 2001 and 2004, Dr. MacGregor was a resident in cardiology at Tufts University, School of Veterinary Medicine.
    * Board certified by the American College of Veterinary Internal Medicine in 2004.
Gary Stuer, DVM, CVA, CVCHM 

Dr. Stuer practices integrative medicine and acupuncture. Dr. Stuer is originally from Lowell, Massachusetts and now lives in Maine. He completed his undergraduate degree at the University of New Hampshire, and received his veterinary degree from Tufts University. He achieved his Certification in Veterinary Acupuncture, and his Certification in Veterinary Chinese Herbal Medicine through the International Veterinary Acupuncture Society (IVAS). Dr. Stuer knew from a very early age—around 9 years old, that he wanted to become a veterinarian. He was influenced early on in his life by a family cat that was hit by a car who completely recovered with extensive medical care. He also spent a lot of time around horses when he was growing up. Dr. Stuer is inspired to offer patients and their people integrative care, combining Western medicine with Eastern influences, where each animal is treated as an individual. His medicine constantly evolves as he learns more from his patients every day. He loves what he does and he is honored to be a caregiver for his clients’ treasured animals. His wife Anne is trained in biochemistry and has a strong interest in nutrition. She volunteers many hours teaching people how to cook wholesome and nutritious foods for themselves and their family. His son, Nick, graduated from college with a biology degree in May of 2014. Dr. Stuer is sure he will end up working with people to help improve their health, wellness and fitness. He is already a gifted healer even at his young age.  Dr. Stuer has a Labrador named Miya and two cats, Yum Yum and Kiki. Dr. Stuer loves being outdoors, snowshoeing in the winter and hiking in the summer. It keeps him connected to.  nature and grounded. The spiritual practice of meditation reminds him of the sacredness and mystery of life. And, of course, Dr. Stuer loves being around animals whenever possible to celebrate the human/animal bond. He also is a fan of regular exercise, and has made a recent commitment with a trainer to keep physically fit.

Loren Cohen Candito, DVM, Diplomate American College of Veterinary Dermatology

Dr. Loren Cohen Candito graduated from Bucknell University with a B.S. in Animal Behavior in 2003 and from Tufts University Cummings School of Veterinary Medicine in 2007. Following graduation, she completed a year-long rotating small animal medicine and surgery internship at Garden State Veterinary Specialists in Tinton Falls, NJ and then a specialty Dermatology internship at Red Bank Veterinary Hospital in Red Bank, NJ. Following this, she completed a residency in Dermatology at the Colorado State University Veterinary Teaching Hospital and became a Diplomate of the American College of Veterinary Dermatology in 2013.  Dr. Candito has a special interest in canine and feline allergy and autoimmune skin diseases.

Our Facility

PVS was designed to maximize our ability to continuously monitor all hospitalized patients. The central treatment and intensive care unit provides for state-of-the art monitoring and therapy for critical patients. We offer complete on-site laboratory services as well as supplemental oxygen, blood transfusions, and continuous ECG monitoring to name a few.