An animal emergency clinic is a specifically defined category of veterinary practice in British Columbia. Such a clinic required to have a veterinarian and assistants on-site overnight, simply being on-call is not sufficient. The standard of care and facilities for an ER is also higher than your average veterinary facility with mandated in-house diagnostic equipment and supplemental oxygen therapy. Usually, staff of an emergency facility are members of the Veterinary Emergency and Critical Care Society. The presence of an emergency facility allows your regular veterinarian to be well rested and alert during their regular work day and continue to perform their duties at the high standard expected of them, while ensuring that their patients receive adequate attention should an emergency situation arise.