DWR Staff | Head of Cardiology and Consultant, Internal Medicine

Jon Wray


RCVS-Recognised Specialist in Small Animal Internal Medicine

Honorary Associate Professor, University of Nottingham

Jon graduated from Bristol University 1996 and worked in mixed animal practice for 2 years. He completed a Residency and held clinical and academic posts before returning to Bristol as Clinical Fellow in Cardiorespiratory Medicine. He holds the RCVS Certificate, Diploma and Specialist Recognition in Small Animal Internal Medicine and the Certificate in Cardiology. He joined DWR in 2008.

Jon has been Chief Examiner for the RCVS Certificate in Small Animal Medicine and is currently Chief Examiner for the RCVS Diploma in Small Animal Medicine. As well as publishing widely on many aspects of internal medicine, he is author of the textbook ‘Canine Internal Medicine: What’s your Diagnosis’ and has lectured widely, both in the UK and internationally, in the fields of Internal Medicine, Cardiorespiratory Medicine and Education. His particular fields of interest are all aspects of cardiorespiratory medicine, swallowing disorders, use of endoscopy in diagnosis and management, endocrinology and interventional radiology. He received training in interventional radiology in the USA.

In 2018, Jon was awarded Fellowship of the Royal College of Veterinary Surgeons by Meritorious Contributions to Clinical Practice and admitted as a Fellow of the Royal Society of Biology



Miller, R., Wilson, C., Wray, J.D., Jacovljevic, S. and Tappin, S. (2015) Adult-onset regurgitation in a dog with an aberrant right subclavian artery: a CT angiographic study Vet Rec Case Rep. 3:1 e000138.

Schwarz, T., Rossi, F., Wray, J. D., Ablad, B., Beal, M. W., Kinns, J., Seiler, G. S., Dennis, R., McConnell, J. F. and Costello, M. (2009) Computed tomographic and magnetic resonance imaging features of canine segmental caudal vena cava aplasia. J. small Anim. Pract. 50, 341-349.

Shaw, S. E., Hillman, T. and Wray, J. (2008) Unusual case of canine leishmaniosis in the UK. Vet. Rec. 163, 283.

Sparkes, A., Wray, J., Leece, E., de Risio, L., Murphy, S., Furneaux, R., Sansom, J. and Coatesworth, J. (2007) Recognised veterinary practice. Vet. Rec. 161, 826-827.

Wray, J. D. (2008) Methaemoglobinaemia caused by hydroxycarbamide (hydroxyurea) ingestion in a dog. J. small anim. Pract. 49, 211-215.

Wray, J. D., Bestbier, M., Miller, J. and Smith, K. C. (2006) Aortic and iliac thrombosis associated with angiosarcoma of skeletal muscle in a dog. J. Small anim. Pract. 47, 272-277.

Wray, J. D. and Blunden, A. S. (2006) Progressive dysphagia in a dog caused by a scirrhous, poorly differentiated perioesophageal carcinoma. J. Small anim. Pract. 47, 27-30.

Wray, J. D., Doust, R. T., Fraser, M., Dennis, R. T. and Blunden, A. S. (2008) Retrobulbar teratoma causing exophthalmos in a cat. J. feline Med. Surg. 10, 175-180.

Wray, J. D., Gajanayake, I. and Smith, S. H. (2007) Congestive heart failure associated with a large transverse left ventricular moderator band in a cat. J. feline Med. Surg. 9, 56-60.

Wray, J. D. and Sparkes, A. H. (2006) Use of radiographic measurements in distinguishing myasthenia gravis from other causes of canine megaoesophagus. J. Small anim. Pract. 47, 256-263.

Wray, J. D., Sparkes, A. H. and Johnson, E. M. (2008) Infection of the subcutis of the nose in a cat caused by Mucor species: successful treatment using posaconazole. J. feline Med. Surg. 10, 523-527.

Garosi, L. S., Platt, S. R., Mcconnell, J. F., Wray, J. D. and Smith, K. C. (2005) Intracranial haemorrhage associated with Angiostrongylus vasorum infection in three dogs. J. Small anim. Pract. 46, 93-99.

O’Neill, E.,J. Pearson, G.R., Wray, J.D., Hall, E.J. (2005) Neuronal glycoproreinosis (Lafora-like disease) in related wire-haired miniature dachshunds. J. vet. intern. Med. 17, 403.

Wray, J.D. (2005) Differential diagnosis of the collapsing dog: Part 1 aetiology and investigation In Pract. 27,16-28

Wray, J.D. (2005) Differential diagnosis of the collapsing dog: Part 2 neuromuscular causes. In Pract. 27, 62-69.

Wray, J.D. (2005) Differential diagnosis of the collapsing dog: Part 3 cardiovascular and miscellaneous causes. In Pract. 27, 93-99.

Wray, J.D. (2005) Blunt cardiac injury. Veterinary Regional Anaesthesia and Pain Medicine 3 (1): 3-10.

Book chapters

Wray, J.D. (2016) Laboratory evaluation of lipid disorders. In: BSAVA Manual of Clinical Pathology (3rd edition), E. Villiers & J. Ristic (eds) BSAVA Publishing, Gloucester.

Wray, J.D. (2003) Chapter 4: Medical Diagnostics. In: Textbook of Veterinary Medical Nursing, C. Bowden & J. Masters (eds), Butterworth-Heinemann. Books

Wray, J.D. (2016) Canine Internal Medicine: What’s your diagnosis? Wiley Publications, In Press.

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