CVS: Ontario Location 2409 S. Vineyard Ave, Suite O Ontario, CA 91761 Phone: (909) 947-3600 http://www.cvsangelcare.com/ California Veterinary Specialists is a 24-hour specialty and emergency facility committed to excellence in internal medicine, surgery and critical patient care. Our family of specialists, dedicated emergency clinicians, and experienced staff, provide a unique team approach to referral medicine. We work closely with your primary care doctor to provide the very best in continued care of your pet.