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Guillaume Ruiz, European Specialist in Small Animal Internal Medicine at Highcroft Referrals

Guillaume Ruiz

European Specialist in Small Animal Internal Medicine
  • DVM

Guillaume joined Highcroft Veterinary Referrals in April 2018. He graduated from Ecole Nationale Vétérinaire d’Alfort, France, in 2009. After graduation, he completed a small animal internship in the same school followed by 3 years as a clinician in the internal medicine department; he obtained a French certificate of advanced practice in small animal internal medicine (CEAV-MI) in 2014. He then worked in first opinion and private referral centers for the following few months before starting a residency in small animal internal medicine at the University of Bristol.

During these years he developed a particular interest for endoscopy and published few research papers in international scientific journals, particularly in gastroenterology, as well as regular articles in continuing education veterinary journals. He also presented his work regularly at French, English and European congresses.

Guillaume obtained the Diploma of the European College in Veterinary Internal Medicine companion animals (ECVIM-CA) in March 2018, becoming Specialist in Small Animal Internal Medicine. Guillaume enjoys all aspects of Internal Medicine, and has a particular interest for Feline Medicine and endoscopy, including minimally invasive techniques.


Polypoid cystitis in a male entire Springer Spaniel puppy. G. Ruiz, M. Day, I. Doran, A. Major, S. Warman; Vet Record Case Reports 2018 6:e000532

Acute pancreatitis in dogs: a frequent disease, a treatment sometimes challenging. Pratique Vet 2018 53: 34-37

Pyogranulomatous meningoencephalitis in a dog. S. Keegan, G. Ruiz, M. Day, T. Cogan, F.-X. Liebel; Vet Record Case Reports 2017 5:e000521

Diagnostic contribution of cytological specimens obtained from biopsies during gastrointestinal endoscopy in dogs and cats. G. Ruiz, L. Verrot, E. Laloy, G. Benchekroun; JSAP 2017 58(1): 17-22

What is your diagnosis? Tracheal inflammatory granuloma in a cat. G. Ruiz, G. Benchekroun; JAVMA 2016 248 (9): 995-997

Comparison of 3 handling techniques for endoscopically obtained gastric and duodenal biopsy specimens: a prospective study in dogs and cats. G. Ruiz, E. Reyes-Gomez, E. Hall, V. Freiche; JVIM 2016 30(4): 1014-1021

Exceptionally long-term survival of a dog with gastric lymphoma and concurrent dietary intolerance. G. Ruiz, E. Reyes-Gomez, L. Colliard; Vet Record Case Reports 2015 3: 1-5

Chronic gastritis and enterocolitis associated with Leishmania infection in an 18-month-old, intact female dog. G. Ruiz, E. Laloy, G. Benchekroun; Vet Quarterly 2015 35(4): 236-239

Spontaneous pulmonary lobe torsion in a young pug. G. Ruiz, L. Boland; Pratique Vet 2015 50: 132-135

A cardiac mass associated with ascites in a dog. G. Ruiz, C. Misbach, V. Chetboul; Pratique Vet 2015 50: 669-670

Nasopharyngeal stenosis treated using a balloon dilatation in a cat. G. Ruiz, A. Decambron, M. Manassero; Revue Vétérinaire Clinique 2014 49: 81-86

A case of infectious and eosinophilic bronchitis associated with gastrointestinal signs in a Shapendoes dog. G. Ruiz, G. Benchekroun; Pratique Vet (2014) 49: 480-483

Bacterial osteomyelitis localized to the sternum in a dog. G. Ruiz, G. Benchekroun; Pratique Vet 2014 49: 292-294

A case of Systemic Lupus Erythematosus in a cat. G. Ruiz, C. Maurey; PMCAC 2012, 47(2): 63-64

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Our practices are open and providing routine, urgent and emergency referral care for your patients. We continue to work safely with social distancing and a combination of telephone consultations and on-site examinations. GP vets should contact our referral centres directly for clinical advice on cases.