Bear in mind that your veterinarian is not only your pet's general physician, but also its surgeon, radiologist, dentist, dermatologist, neurologist, ophthalmologist, psychiatrist, ears/nose/throat doctor, and pharmacist.
Your veterinary bill is a reflection of the costs of maintaining suitable facilities, equipment, and support personnel to provide the level of care that is expected in animal medicine today. Remember too that the original cost of the animal has no bearing on the cost of services rendered.