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Internal Medicine team

Isuru Gajanayake

BVSc CertSAM DipACVIM DipECVIM-CA DipACVN MRCVS

Head of Internal Medicine
RCVS Specialist in Small Animal Medicine (Internal Medicine)
American and European Specialist in Small Animal Internal Medicine
American Specialist in Small Animal Nutrition

Isuru graduated from the University of Sydney in 1998.  After spending two years in mixed practice in rural Australia, he moved to the United Kingdom to work as a small animal vet locum and also travelled around Europe. He then joined Willows' general practice clinic in 2002. During the following three years in this post, Isuru developed an interest in medicine and successfully completed the RCVS Certificate in Small Animal Medicine. In 2005, he moved to the Royal Veterinary College to undertake a one-year rotating Internship, followed by a combined Residency in small animal internal medicine and clinical nutrition. Isuru was the first resident to undertake a clinical nutrition training programme in the UK. Following the end of his residency, Isuru successfully achieved specialist status from the American College of Veterinary Internal Medicine in 2010. He became a diplomate of the American College of Veterinary Nutrition in 2016.

Isuru has a keen interest in all aspects of internal medicine but particularly enjoys dealing with immune-mediated and gastroenterology cases. He also enjoys the challenges involved in the nutrition of hospitalised patients, using both enteral and parenteral feeding techniques. In addition to his clinical duties, Isuru also enjoys teaching undergraduates, veterinary surgeons and nurses.

Isuru aims to provide the highest level of care for his patients, their owners and referring veterinary surgeons, and he thoroughly enjoys being part of the team at Willows who have the same commitment to the pets under their care.

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Kirsty Roe

BVSc CertSAM DipACVIM DipECVIM-CA MRCVS

RCVS Specialist in Small Animal Medicine (Internal Medicine)
American and European Specialist in Small Animal Internal Medicine

Kirsty graduated as a Veterinary Surgeon from the University of Bristol in 2000. She spent five years working in small animal practice in London and Northampton, where she developed a keen interest in canine and feline general medical problems. In 2005 she was selected as a Junior Clinical Fellow in Internal Medicine at The Animal Health Trust in Newmarket, where she completed her Royal College Certificate in Small Animal Medicine. She then completed a three-year residency at The Royal Veterinary College in London and gained the Diploma of the American College of Veterinary Internal Medicine in February 2010.

Kirsty enjoys both the challenge of the Internal Medicine discipline, and also the care element of her role with the seriously ill animals that she treats. Kirsty is particularly interested in feline medicine and endocrinology. She very much enjoys being part of the top-notch team of multi-disciplinary specialists at Willows, and contributing to the high level of support and expert care provided for her patients, their owners and the referring veterinary surgeons who use the Willows service.

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Stephanie Sorrell

BVetMed(Hons) MANZCVSc DipECVIM-CA MRCVS

RCVS Specialist in Feline Medicine
European Specialist in Small Animal Internal Medicine

Stephanie graduated from the Royal Veterinary College in 2008. After spending some time in first opinion practice she returned to undertake a rotating small animal internship. In January 2014 she completed a residency in Internal Medicine at Edinburgh University funded by International Cat Care (formerly The Feline Advisory Bureau) at the University of Edinburgh.

Stephanie obtained the Australian and New Zealand College of Veterinary Scientist Membership Status in Feline Medicine in September 2013 and completed the Diploma of the European College of Veterinary Internal Medicine in 2015. She obtained RCVS Specialist in Small Animal Medicine in 2016 and RCVS Specialist in Feline Medicine in 2017. She enjoys all aspects of internal medicine and the challenge that each case provides. Her particular interests are feline medicine, haematology and transfusion medicine and emergency and critical care. Stephanie is delighted to be part of the Willows team and to be able to provide the highest standards of care to her patients and clients.

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Fergus Allerton

BSc BVSc CertSAM DipECVIM-CA MRCVS

European Veterinary Specialist in Small Animal Internal Medicine

Fergus graduated from the University of Bristol in 2004. He spent six years working in a mixed practice in Worcestershire. While developing a broad range of experience, a keen interest in all things medical motivated him to pursue the Royal College Certificate in Small Animal Medicine. Fergus spent three years undertaking a medicine residency at the University of Liege in Belgium studying for the Diploma of the European College of Veterinary Internal Medicine..

Fergus enjoys the wide variety of internal medicine cases and the diagnostic challenges posed by these patients. He has particular interests in haematology, immune-mediated disease and critical care medicine. Fergus joined Willows in October 2013 and is enjoying being part of the specialist team at Willows, with the opportunity to provide the highest standard of care for patients, owners and referring veterinary surgeons.

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Andrew Kent

BVSc DipECVIM-CA MRCVS

RCVS Specialist in Small Animal Medicine
European Veterinary Specialist in Small Animal Internal Medicine

Andy graduated from the University of Bristol in 2008. He spent a year in mixed practice in Somerset and then three years in a busy small animal hospital in Cheshire, where he developed an interest in small animal medicine. In 2012 he moved to the Queen’s Veterinary School Hospital (University of Cambridge) to undertake a Senior Clinical Training Scholarship (residency) in Small Animal Internal Medicine. He moved to Willows upon completion of this in 2015.

Andy completed the Diploma of the European College of Veterinary Internal Medicine in 2016, becoming a European Veterinary Specialist in Small Animal Internal Medicine.

He enjoys all aspects of internal medicine but has a particular interest in gastroenterology and immune-mediated diseases. His research interests have focused on gastrointestinal and pancreatic disease.

In addition to internal medicine, Andy has a major interest in interventional endoscopy and radiology and spent time in the USA receiving additional training and gaining experience of a variety of techniques as well as spending time with leading human endoscopists in the UK. He regularly performs a wide range of interventions, including gastrointestinal (balloon dilation of strictures, palliative stenting), respiratory (tracheal stent placement for tracheal collapse) and urological (cystoscopic laser ablation of ectopic ureters, cystoscopic ureteral stenting, sub-cutaneous ureteral bypass procedures, palliative stenting of urethral obstructions). In addition to this he is the only clinician in the UK developing endoscopic biliary interventions, including ERCP, removal of biliary stones and endoscopic stent placement.

Andy is proud to be part of the Willows team and to have access to such outstanding clinical facilities, allowing him to provide the highest standards of care to his patients and to provide cutting-edge techniques and treatments.

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Mark Dunning

MA VetMB PhD CertSAM DipECVIM-CA MRCVS

RCVS Specialist in Small Animal Internal Medicine
European Specialist in Small Animal Internal Medicine

Mark qualified from Cambridge in 1997 and spent time in both mixed and small animal practice. He began a residency in Small animal medicine at the University of Liverpool in 2000 but interrupted this to undertake a PhD in Neuroscience at the University of Cambridge investigating the use of MRI to monitor the outcome of novel therapies for multiple sclerosis and spinal cord injury in humans. Following completion of his PhD, Mark completed a residency in Small Animal Medicine at Cambridge. Mark then spent 4 years in private specialist practice in the south of England before moving to Nottingham Vet School as Clinical Associate Professor in Small Animal Internal Medicine. Mark was responsible for running the final year medicine rotation along with lecturing to all years of the veterinary course. He was responsible for the School’s small animal intern and residency programmes in addition to supervising both undergraduate and post-graduate research students. Mark holds the European Diploma in Small Animal Internal Medicine and is an RCVS and EBVS® recognised specialist in Small Animal Internal Medicine.

Mark remains actively involved in both undergraduate and post-graduate teaching via his ongoing role as Clinical Associate Professor in Small Animal internal medicine at the School of Veterinary Medicine and Science, University of Nottingham. Mark remains research active both within the school and with national and international collaborators. These projects include investigations into canine breed-related diseases, canine cancer, canine and feline haematology, canine endocrine disease, how owners and vets make clinical decisions and the development of novel non-invasive biomarkers to help diagnose both simple and complex medical diseases in both primary care and referral settings. Mark lectures both nationally and internationally and has published widely in the field of veterinary medicine.

Mark has a broad interest in internal medicine but particularly enjoys the challenges posed by gastrointestinal, endocrine, haematology and renal medicine. Mark is excited to be joining the outstanding team at Willows and being able to provide both exceptional and compassionate care for the cats and dogs and their owners attending the clinic; along with providing an outstanding service to the referring veterinary surgeons. He particularly hopes to see lots of Norwegian Forest cats and Irish Wolfhounds, his absolute favourites!

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