What this page does
This page helps you decide whether to leave the house. It does not diagnose, it does not treat, and it contains no doses of anything, because home treatment of an emergency by an owner working from a web page is how animals get worse on the way to help. Everything below is either a reason to go, or preparation that has to be done on an ordinary afternoon to be worth anything at two in the morning. If you are unsure, going is the cheap error.
The signs that mean go now
Emergency triage does not run on how much pain the animal appears to be in. It runs on breathing, circulation, consciousness and the ability to pass urine. When one of those is failing, the time between noticing and arriving changes the outcome. The signs below are the ones worth committing to memory, because they are recognisable from across a room.
| Sign | Why it is urgent |
|---|---|
| Difficulty breathing — open-mouth breathing in a cat, neck extended, exaggerated effort, gums blue, grey or very pale | A cat breathing through its mouth at rest is abnormal by itself. This category tolerates no waiting |
| Collapse, unresponsiveness, marked weakness or inability to stand | Circulatory, metabolic, toxic and neurological causes all present this way |
| Seizure lasting more than a few minutes, or repeated seizures in a day, or a first seizure ever | Prolonged seizure activity raises body temperature and risks lasting damage |
| Distended, hard, drum-like abdomen with unproductive retching, restlessness and drooling — especially in a large deep-chested dog | Consistent with gastric dilatation and volvulus, which progresses fast and is surgical |
| Straining in the litter box producing little or no urine, crying, repeated trips — especially a male cat | Urinary obstruction becomes life-threatening within a day or two and is easily mistaken for constipation |
| Known or suspected ingestion of a medication, chemical, plant or food on the dangerous list | By the time signs appear, absorption is often well underway |
| Bleeding that will not stop with steady direct pressure | Blood loss, and some wounds look small from outside |
| Heatstroke signs after heat or exertion — frantic panting, bright red gums, vomiting, wobbling, collapse | Organ damage begins before the animal looks dramatic, and cooling alone is not treatment |
| Hit by a car, fall, crush injury, or an attack by another animal | Internal injury is routinely invisible for hours, and a calm-looking animal after trauma still needs assessment |
| Difficult or prolonged labour | Time-critical for both mother and offspring |
| Eye injury, sudden squinting, or a bulging eye | Vision is lost quickly and the window for saving it is short |
The pattern worth noticing is that most of these are quiet. The cat with an obstruction does not scream, it keeps visiting the box. The dog with a twisted stomach may still walk to the door. Looking basically fine is the most common reason people wait, and it is the reason the waiting hurts.
Household things that poison dogs and cats
Poisonings do not usually involve exotic substances. They involve the chocolate on the counter, sugar-free gum in a bag, an onion scrap on the floor, a bouquet in a vase, or a single tablet from a bottle someone left out. Risk depends on the amount and the animal's weight, which is exactly why owners should not be doing the arithmetic themselves.
| Item | Notes |
|---|---|
| Human pain relievers — acetaminophen, ibuprofen, naproxen and others | Toxic to dogs and cats. Cats are extraordinarily sensitive to acetaminophen. Never give any human medication without direction from a veterinarian |
| Xylitol and other sugar substitutes | Sugar-free gum, mints, some peanut butters, some supplements. Dangerous to dogs in small amounts |
| Chocolate, especially dark and baking chocolate | Risk scales with cocoa content and body weight, so type and amount both matter to the vet |
| Grapes and raisins | Associated with acute kidney injury in dogs; individual sensitivity varies and no safe amount is established |
| Onion, garlic, leeks and chives | Includes cooked and powdered forms in sauces and broths. Signs can be delayed by a day or more |
| Lilies | Acutely dangerous to cats, including pollen groomed off the coat. The rule in a cat household is simply not to have them |
| Antifreeze — ethylene glycol | Tastes sweet, causes kidney failure, and time matters more here than almost anywhere else |
| Rodenticides and slug bait | Different active ingredients need entirely different treatment, so the packaging is essential |
| Cannabis, edibles, nicotine and vape liquid | Increasingly common. The staff have seen it, they are not there to judge you, and an accurate account changes what they do |
| Dog flea products applied to cats | Several are seriously toxic to cats. Call before attempting to wash it off |
| Swallowed objects — string, bones, toys, corn cobs, hair ties | Obstruction and perforation. Never pull on string that is visibly protruding from either end of a cat |
Do not induce vomiting on your own. Hydrogen peroxide advice circulates widely and it is wrong often enough to matter: with corrosives and petroleum products, vomiting injures the oesophagus a second time on the way up; with sharp or large objects it makes things worse; in an animal that is drowsy or seizing it risks aspiration; and if enough time has passed the stomach may already be empty of it. Whether to induce vomiting, and how, is a decision for the veterinarian or an animal poison control line. Call them, tell them what was swallowed, roughly how much, when, and the animal's weight, and do what they say.
The preparation that has to happen first
Save the nearest 24-hour emergency veterinary hospital in your phone tonight, and save a second one further out. Emergency hospitals go on divert, run at capacity, or turn out to be forty minutes away in the direction you did not expect, and searching for one while an animal is deteriorating on the back seat is the worst possible time to learn that. Ask your regular clinic which hospital they refer to after hours; they will tell you, and they will know which ones have overnight staffing rather than just an answering service.
Save an animal poison control number as well. These services are staffed by toxicology specialists, they typically charge a consultation fee, and the case number they give you goes with you to the hospital and shapes treatment there. The fee is not the part of the evening you will regret.
Keep the one-page record described in the dog vaccination guide and the cat vaccination guide: weight, current medications and doses, chronic conditions, vaccination dates, microchip number, your clinic. At two in the morning people cannot reliably recall their own animal's weight, and every one of those questions gets asked in the first three minutes.
Getting there without making it worse
Call on the way, or have someone call while you drive. Telling them what is coming means the room is ready, and if they cannot handle it they will redirect you before you have wasted the drive.
Every cat goes in a carrier, without exception. A frightened cat carried in someone's arms across a parking lot becomes a search, and that search takes the rest of the night. A covered carrier calms most cats. A cat struggling to breathe should be left in whatever position it has chosen rather than repositioned for convenience.
Large dogs move on a blanket used as a stretcher, with two people taking the corners, which keeps the body from folding. Do not press on or lift under a distended abdomen. Injured animals bite, including gentle ones, so keep hands away from the face and use a muzzle if you must — but never on an animal that is vomiting, struggling to breathe, or overheating. Cover them for warmth rather than running the heater hard, and do not put a heat source against an animal that cannot move away from it.
The cost conversation, had in advance
Emergency care is expensive, after-hours pricing is normal, and the estimate arrives at the exact moment you are least able to think about money. The two things that help are both decided beforehand. One is a funding plan — pet insurance with the exclusions and reimbursement structure read properly before enrolment, or a dedicated savings buffer, or knowing which credit line is available. The other is a family conversation about how far you would go, held while nobody is crying in a waiting room. Neither is a comfortable evening's work, and both are far less costly than making the decision cold. The pet cost calculator has a line for an emergency reserve for exactly this reason.
One last thing, and it is the part owners most need to hear: emergency clinicians do not resent the visit that turns out to be nothing. Being told your dog is fine costs an exam fee. Being wrong in the other direction costs something you cannot buy back. Call first, and if you cannot decide, go.
Questions people ask
My dog ate something he should not have but seems completely normal. Can it wait?
Normal appearance is not reassurance with most toxins, because signs frequently appear hours after absorption is already underway, and risk depends on amount and body weight. Collect the packaging and any remainder, note the time, and call your veterinarian or an animal poison control line straight away. Do not try to make him vomit — with several common substances that causes additional injury, and whether to do it is their call, not yours.
My cat keeps going to the litter box and nothing is coming out. Is that an emergency?
Treat it as one, particularly with a male cat. Urinary obstruction can become life-threatening within a day or two, and it is easy to mistake for constipation. Repeated trips, crying, straining, a firm painful lower abdomen, or no urine clumps in the litter all point the same way. Go to an emergency hospital, use a carrier, and do not press on the abdomen.
Should I hold my dog down or put something in his mouth during a seizure?
No. Never put your hands or any object in the mouth — you will be bitten and it does not help. Clear furniture and hazards away, dim the lights and noise, note the time it started, and film briefly if you can, because that video is genuinely useful to the vet. Go immediately if it lasts more than a few minutes, repeats within a day, or is the first one this animal has ever had.
Can I give my dog a human painkiller until the vet opens?
No. Acetaminophen, ibuprofen, naproxen and other human analgesics are toxic to dogs and cats, and cats are especially vulnerable to acetaminophen. Dosing an animal from a human bottle is a common cause of emergency admissions and it can cause permanent damage. If an animal is in enough pain that you are considering it, that is itself a reason to be seen, not a reason to medicate.
How do I find a 24-hour emergency vet before I actually need one?
Ask your regular clinic which hospital they refer to after hours, and confirm that it is staffed overnight rather than running an answering service. Save it, then save a second option further away, since the nearest one can be full or on divert. Add an animal poison control number to the same contact list. Doing this on a quiet weekday afternoon takes ten minutes and removes the worst variable from a bad night.