A cat that chewed a live cord usually has 2 burns, not 1, and only the front one shows. The first sits at the lip commissure or the tongue edge where the wire entered; the second sits on the hard palate behind the upper incisors, where current left the body through the moist mucosa. The visible burn is rarely what brings the cat back to the clinic 6 hours later. That visit is for fluid in the lungs, and a further 24 hours of heart rhythm risk follows even when the cat looks completely normal at hour 2.
Two burns, and the second one hides behind the teeth
Look at 3 places in this order: both lip commissures, the tongue margins, and the hard palate 5 to 15 mm behind the upper incisors. Expect 2 lesions in a typical cord bite, each 2 to 5 mm, pale grey or charred at the centre with a red rim. The palatal lesion is the one owners miss, because lifting the lip shows the lip burn and the cat resents having its mouth opened. Use a pen torch and a wooden tongue depressor, look for 5 seconds, and stop. Never pry the jaw wide: a cat in pain with a burned mouth bites the hand that is holding it. Between 24 and 48 hours the dead tissue sloughs and the lesions turn yellow grey and look worse, which is expected, not a sign of infection spreading.
Cut the power in the right order
- Kill the circuit at the breaker, or flip the wall switch, before anything else. A live cord plus a frightened cat is the worst pairing in the house.
- Grip only the plug body, never the flex. Leave the length in the cat's mouth alone; a live 220 V cable that comes free under tension snaps back into the jaw.
- If the socket sits behind furniture, sweep the cat away from the cable with a dry wooden broom, standing 1 m back, and close in only once the plug is on the floor.
- Coil the cord and remove every other cable in the room. A cat that chewed once chews again, and 1 in 3 repeat bites happen within 72 hours.
Next, press a fingertip on the gum above a canine and time how long the colour takes to return: 2 seconds or less is normal. Then watch the chest for 30 seconds and double it; a resting cat should sit between 20 and 30 breaths per minute, and 40 or more is a problem. If the cat is unresponsive or not breathing, start rescue breaths and drive.
The lungs: a 6-hour timer, not a 2-hour one
Current travels from the low-resistance vessels of the mouth to the thorax and injures the pulmonary capillary bed. The result is non-cardiogenic pulmonary edema, and it does not follow the burn's timetable. Most cases declare themselves around 6 hours after the shock, with a range of 6 to 12 hours; a cat that is normal at hour 2 has proved nothing at all. Signs are a resting rate above 40 per minute, pink froth at the nostrils, open-mouth breathing, or a cat that will not lie flat. Because the window is 6 hours, a cat shocked at 21:00 needs a vet decision by 03:00, not a morning appointment.
The heart: 24 hours of arrhythmia risk
Electric current irritates the myocardium, and ventricular arrhythmias can appear hours after the shock in a cat with a normal exam and first ECG. Most vets keep the cat on a monitor or place a 24-hour Holter, and 24 hours is the usual stand-down period. An arrhythmia that starts at hour 18 still counts.
| Hour after shock | Recheck (min) | What is checked | Warning value |
|---|---|---|---|
| 0 to 1 | 15 | gums, breathing rate, mouth burns | rate over 40/min |
| 1 to 6 | 60 | respiratory rate and effort | rise of 10/min |
| 6 to 12 | 60 | crackles, colour | any crackle |
| 12 to 24 | 120 | ECG or Holter, heart rate | rate over 220/min |
| 24 to 72 | 360 | eating, mouth healing | no food in 24 h |
At home the only number you can take reliably is the resting respiratory rate: count for 30 seconds while the cat sleeps, multiply by 2, write it down with the time. Six readings across 24 hours beat one exam. A rate that climbs from 24 to 34 per minute over 4 hours is a call, even if the cat is eating.
What not to do in the first hour
Do not rub butter, oil or toothpaste on the burns; all 3 trap heat and add a foreign material to a wound that is already contaminated. Do not give water by mouth to a cat that is drooling or has a weak swallow, because aspiration is the second hit on lungs that are already leaking. Do not give any human painkiller: 1 acetaminophen tablet is fatal-range for a 4 kg cat within 24 to 48 hours, and ibuprofen causes kidney injury. Do not wait for a burn to blister before calling. Skip ice on the mouth; cold constricts the mucosa and hides lesion depth.
The 24, 48 and 72-hour rechecks
Expect a recheck at 24 hours for lungs and rhythm, at 48 hours for the mouth, and at 72 hours for eating and hydration. Roughly 1 in 4 cats with palatal burns need soft food for 5 to 7 days, and a cat that has not eaten in 24 hours needs a feeding plan rather than patience. Antibiotics are prescribed only if the lesions are infected, and pain relief comes as a veterinary prescription, usually a 3 to 5 day course. Bring the cord or a photo so the vet can judge wire gauge and contact time.
Childproofing that actually works
Wrap cords in a 10 mm split conduit, run them at least 30 cm under a rug edge or behind furniture, and unplug appliances that are not in use. Offer 2 alternatives at the same spot: a 40 cm sisal rope toy and a silvervine stick. Cats that chew cables usually start between 4 and 12 months, and the habit drops sharply after 18 months if the cables stop being reachable. Check every cable in the house the same evening, not just the one that was bitten.
First 10 minutes, step by step
- Breaker off, plug out, cord coiled and out of reach.
- Check breathing and gums; count 30 seconds of chest movement.
- Open the mouth once, with a torch, for 5 seconds: lip, tongue, palate.
- Photograph the 2 lesions with a ruler beside them.
- Call the clinic, say cord bite and the hour it happened, and ask for a 6-hour window.
- Keep the cat quiet and warm at 20 to 24 C room temperature, with no food if sedation may be needed.
For burns on paws or flank from a fallen lamp, the cooling steps in electrical cord burns apply. If the cat is straining to urinate after the shock, follow catheter aftercare rules and call the clinic; stress and dehydration both trigger blockage in male cats.
Terms mentioned in this article
Frequently asked
The cat yelped, then ate dinner and seems fine. Do I still need the vet tonight?
Yes. The burn you can see is at the lip or tongue, but the injury that kills is non-cardiogenic pulmonary edema, and it usually declares itself around 6 hours after the shock, with a range of 6 to 12 hours. A normal hour 2 proves nothing. Count the resting respiratory rate for 30 seconds, multiply by 2, and call the clinic; also expect 24 hours of arrhythmia monitoring, since ventricular rhythms can start at hour 18.
How many burns should I look for in the mouth?
Two in a typical cord bite: one at the lip commissure or tongue margin where the wire entered, and one on the hard palate 5 to 15 mm behind the upper incisors where current exited. Each is 2 to 5 mm, grey white or charred with a red rim. Use a pen torch and a wooden tongue depressor, look for 5 seconds, and never pry the jaw wide, because a cat with a burned mouth will bite.
Should I put butter, oil or ice on the mouth burns?
None of the three. Butter and oil trap heat and add foreign material to a contaminated wound, and ice constricts the mucosa and hides how deep the lesion runs. Rinse gently if the cat allows it, keep the mouth clean, and let a vet judge depth and pain control. Pain relief and antibiotics come only on veterinary prescription, and 1 acetaminophen tablet is a fatal-range dose for a 4 kg cat.