Signs your pet needs emergency care, not a regular appointment

Telling a real emergency from a wait-and-see situation

Most pet owners have stood in the kitchen at 9pm trying to decide whether a symptom is scary or just weird. That decision matters, because for true emergencies, getting your pet care within the first hour or two can change how a fast-moving problem plays out. That’s the reason this guide exists.

This is general information meant to help you think clearly in the moment, not a substitute for a vet’s judgment about your specific pet. If you’re ever unsure, calling a vet or an emergency clinic and describing what you’re seeing is faster and safer than trying to self-diagnose from a website.

Signs that mean go now

A handful of symptoms are close to universal red flags across species and breeds. Difficulty breathing is at the top of the list, whether that looks like open-mouth breathing in a cat, rapid shallow breaths, or visible effort with each breath. Collapse or sudden inability to stand is another one that needs immediate attention, as is non-productive retching, where a dog (often a large, deep-chested breed) tries to vomit but nothing comes up, which can point to bloat, a fast-moving and dangerous condition.

Seizures that last more than a couple of minutes, or that come in clusters one after another, are an emergency even if your pet seems normal in between. Being hit by a car always warrants an ER visit, even if your pet appears to be walking fine afterward, since internal injuries aren’t always visible right away. Deep wounds with heavy bleeding, suspected poisoning (getting into chocolate, medications, or household chemicals), straining to urinate with no output, especially in male cats, and any injury to the eye also belong on this list.

Signs that usually can wait

Not every odd symptom needs a midnight drive across town. Mild limping with no visible swelling, a small superficial cut that’s already stopped bleeding, one episode of vomiting in a pet who’s otherwise acting completely normal, and mild itching without other symptoms are all things that typically hold until a regular or next-day appointment. The key word is “typically”: if any of these come with other symptoms layered on top, like limping plus lethargy, treat it more seriously.

Symptom	Urgency level
Difficulty breathing or open-mouth breathing in a cat	Emergency now
Non-productive retching, distended belly	Emergency now
Seizure lasting more than 2 minutes, or clusters	Emergency now
Straining to urinate with no output (especially male cats)	Emergency now
Deep wound with heavy bleeding	Emergency now
Sudden vomiting or diarrhea, otherwise acting normal	Call today
Limping with visible swelling or pain	Call today
Mild limping, no swelling, still bearing weight	Can wait for routine appointment
Small superficial cut, already stopped bleeding	Can wait for routine appointment
Mild itching, no other symptoms	Can wait for routine appointment

What to do on the way

If you’re heading to an emergency vet, calling ahead helps more than most people realize. It gives the clinic a chance to prepare, and the staff on the phone can often tell you what to do, or specifically what not to do, before you arrive. Keep your pet as calm and warm as you reasonably can during transport, and avoid sudden movements if you suspect a broken bone or spinal injury. Never give human medication, including common painkillers, without a vet’s direction, since several common over-the-counter drugs are toxic to dogs and cats even in small amounts.

Emergency exam fees typically start around 150 dollars and scale up from there based on severity, up to roughly three times that for severe trauma cases, with after-hours or overnight visits adding another 30 to 60 percent on top. Overnight hospitalization, if needed, adds significantly more. Knowing that going in doesn’t make the moment less stressful, but it does mean the bill won’t be a total surprise on top of everything else.

You can look through emergency vets across the Denver metro to see who’s available near you, ideally before you need one rather than during a crisis. Our home page has the full directory, and our methodology page explains how we evaluate and rank listings.