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

Fergus is currently the chairman of the Small Animal Medicine Society (SAMSoc) and has been involved in the PROTECT ME initiative to encourage rational antibiotic use in small animal patients. He is currently editing the next edition of the BSAVA formulary. His particular interests include gall bladder disease (especially mucocoeles in Border Terriers), canine sinonasal aspergillosis, haematology, immune-mediated disease and antibiotic stewardship.

Fergus has a cat called Spartacus and a stick insect called Clive.