Emergency hours
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| Thursday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
| Sunday | Open 24 hours |
As published by the hospital: “Open 24 hours”
Before you go
- Call while you are getting ready: describe what happened and ask about the current wait.
- Bring any medication, packaging or plant your pet may have eaten, and your pet's records if they are at hand.
- Expect triage: the most critical patients are seen first, as in a human ER. Full checklist.
What the hospital states on its website
- Emergency surgery“…and Joint Surgery Bone Biopsy Comprehensive Peri-Operative Monitoring Emergency Surgery Hip Dysplasia Diagnosis and Management Minimally Invasive Surgery…” Hospital page
- CT or MRI imaging“…Scanning) Digital Radiography Fluoroscopy Magnetic Resonance Imaging (MRI) Thoracic Ultrasonography / Thoracocentesis Ultrasonography…” Hospital page
Shown only where the hospital says so on its own site, quoted as published. A missing item means we found no statement, not that the service is unavailable. Fees and policies change: confirm by phone.
Other emergency hospitals nearby
Inland Valley Veterinary Specialists & Emergency Center
Open now · 24/710 W 7th St, Upland, CA 91786Emergency surgeryBlood transfusionCareCreditScratchpayVerified November 4, 20264.8 miles(909) 931-7871VEG Rancho Cucamonga
Open now · 24/7Veterinary Emergency Group11425 Foothill Blvd, Rancho Cucamonga, CA 91730Exotic petsEmergency surgeryWalk-insVerified November 4, 20266.1 miles(909) 280-2496PETEMERG Emergency Animal Hospital
Open now · 24/712367 Foothill Blvd, Rancho Cucamonga, CA 91739Verified November 4, 20266.7 miles(949) 324-2444MarQueen Veterinary ER & Specialty Upland
Open now · 24/71582 N Benson Ave, Upland, CA 91786CT or MRICareCreditScratchpayVerified November 4, 20267.6 miles(909) 303-1700Corona Animal Emergency Center
Open now · 24/7541 N. Main Street, Suite 107, Corona, CA 92880Emergency surgeryBlood transfusionVerified November 4, 202610 miles(951) 482-5137
Questions about VCA California Veterinary Specialists - Ontario
- Is VCA California Veterinary Specialists - Ontario open 24 hours?
- Yes. VCA California Veterinary Specialists - Ontario has an emergency service open 24 hours a day, 7 days a week, according to the VCA hospital page checked on November 4, 2026. Holiday hours can differ: call (909) 947-3600 before you leave.
- What is the phone number of VCA California Veterinary Specialists - Ontario?
- (909) 947-3600. The hospital is at 2409 S. Vineyard Avenue, Suite O, Ontario, CA 91761.
- What emergency facilities does VCA California Veterinary Specialists - Ontario have?
- Its website mentions emergency surgery and CT or MRI imaging.
Places this hospital serves
- Emergency vet in Anaheim
- Emergency vet in Riverside
- Emergency vet in Santa Ana
- Emergency vet in San Bernardino
- Emergency vet in Moreno Valley
- Emergency vet in Fontana
- Emergency vet in Huntington Beach
- Emergency vet in Ontario
- Emergency vet in Rancho Cucamonga
- Emergency vet in Garden Grove
- Emergency vet in Corona
- Emergency vet in Pomona
- Emergency vet in Fullerton
- Emergency vet in Orange
Where this listing comes from
- VCA hospital page, source page, checked November 4, 2026: “HOURS Mon: Open 24 Hours Tue: Open 24 Hours Wed: Open 24 Hours Thu: Open 24 Hours Fri: Open 24 Hours Sat: Open 24 Hours Sun: Open 24 Hours GET IN TOUCH Phone: 9”
Something wrong? Report a correction.