O’Sullivan Animal Hospital is open 24 hours a day / 7 days a week! We’re proud to be a 24 hour Veterinary Hospital in Barrie, Ontario!

We now have dual accreditation as an emergency and animal companion hospital. Call us 24/7 in the event of an emergency*

*Note:  No veterinarian is on-site between the hours of 1:00am-7:00am