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Emergency vet open now: after-hours and overnight care in Denver

When a pet gets hurt or turns sick at 2am, the question is not which emergency vet ranks best overall, it's which one has a doctor on site right now. This page is built around that urgency: clinics that run true overnight shifts, staff 24/7 emergency lines, and can take a walk-in at 3am on a Sunday.

  • Confirm the clinic is staffed with a vet on site, not just an answering service, before you drive over.
  • Call ahead when possible so the team can prep for trauma, poisoning, or a whelping emergency.
  • Have your pet's weight and any known conditions ready, it speeds up triage at the door.

This is for the pet owner dealing with a bloated stomach, a car strike, seizures, or a toxic ingestion in the middle of the night, not someone comparing routine care options.

What it costs

After-hours and overnight emergency visits carry a base exam fee that runs higher than daytime urgent care because of on-call staffing, and costs climb fast with diagnostics like x-rays or bloodwork and any overnight hospitalization. Ask for a written estimate range before treatment starts if your pet is stable enough to wait a few minutes.

Top 3 by our score

Ranked from our published scoring of public Google reviews for emergency & urgent care vet.

  1. 1. VEG ER for Pets
    4.8★ · 2062 reviews
    91
  2. 2. VEG ER for Pets
    4.9★ · 349 reviews
    91
  3. 3. Denver Animal Hospital
    4.7★ · 281 reviews
    89

See the full ranking → · Browse all providers

FAQ

Is there a vet open right now in Denver at 3am?
Several emergency clinics in the metro area run true 24/7 overnight shifts with a doctor on site. Call first to confirm current staffing and expected wait, since volume can back up an ER on holidays or weekends.
Should I call before driving to an emergency vet at night?
Yes. A quick call lets the team flag your case (bleeding, seizure, suspected poisoning) so they can prep a room and tell you if another location is faster given current ER traffic.
Do overnight emergency vets cost more than daytime visits?
Generally yes, the exam fee itself is usually higher after-hours because of overnight staffing, on top of whatever diagnostics or treatment your pet needs.