• 
  Nurture Vets - Wells

  Wells
• 
  Nurture Vets - Weston

  Weston-super-Mare
• 
  Nutbourne Veterinary Centre

  Southbourne
• 
  O'Reilly & Fee Armagh Vets

  Armagh
• 
  Oak Barn Vets

  Shalford
• 
  Oak Tree Veterinary Centre

  Edinburgh
• 
  Oakham Vet Hospital

  Oakham
• 
  Oakhouse Vets - Carlton

  Carlton
• 
  Oakhouse Vets - Mapperley

  Arnold
• 
  Oaklands Vet Centre

  Ingleby Barwick
• 
  Oakley Veterinary Clinic

  Caversham
• 
  Oakmount Veterinary Centre

  Burnley
• 
  Oakwood Vets

  Harleston
• 
  Oban Veterinary Surgeons

  Oban
• 
  Ocean Vets - Alderholt

  Alderholt
• 
  Ocean Vets - Three Legged Cross

  Three Legged Cross
• 
  Okeford Veterinary Centre - Okehampton

  Okehampton
• 
  Okeford Veterinary Centre Chagford

  Chagford
• 
  Old Courts Veterinary Centre - Brigg

  Brigg
• 
  Old Hall Vets

  Appleby-in-Westmorland
• Old School Veterinary Practice - Harrapool, Broadford

  Isle of Skye
• Old School Veterinary Practice - Kyle of Lochalsh

  Kyle of Lochalsh
• 
  Old Stone Vets - Allendale

  Hexham
• 
  Old Stone Vets - Alston

  Alston