A cat that starts dripping saliva at 15:00 is not being dramatic. When swallowing is blocked, painful or nauseated, the salivary glands keep making 1 to 3 ml per kilogram per hour and the fluid has nowhere to go but the floor. Three clocks decide the move. Breathing trouble, a swollen face or a known toxin means the car leaves in 30 minutes. Drooling with 2 vomits and 6 hours of refusing food means the clinic today. Drooling that comes and goes over 3 days in a cat still eating 40 g a day means a dental visit within 72 hours.
The 30-minute line, and the 2-hour line behind it
Thirty minutes is drive time plus the 10 minutes a clinic needs to place a catheter. Go now if the resting respiratory rate is over 40 a minute, if the mouth hangs open at rest, if 1 side of the face is swollen and that eye is squinting, if a dog flea product touched the neck in the last 6 hours, or if a button battery went down. A battery in the esophagus for 2 hours burns a hole; 30 minutes of driving beats 30 minutes of watching.
The 2-hour line covers the middle: cat alert, breathing 25 to 30 times a minute, temperature 38.1 to 39.2 C, only the chin wet. Weigh a dry paper towel, wipe the chin for 10 minutes, weigh it again; 1 g is about 1 ml. Under 5 ml in a cat that still swallows is a same-day appointment. Over 15 ml, or a cat that cannot clear its own saliva, is the 30-minute line.
Three cause groups, three clocks
Almost every case lands in 1 of 4 buckets, and the bucket sets the clock.
| Tier | Cause group | Typical clue | Vet within | Saliva rate | Log items |
|---|---|---|---|---|---|
| 1 | Mouth and throat | 1-sided chewing, tartar on 4 molars, 2 mm ulcer under the tongue | 72 h | 10-30 ml/h | 4 |
| 2 | Toxin or drug | Dog flea drop on the neck 6 h ago, tremors, 20 minutes of lip smacking | 30-120 min | 30-60 ml/h | 5 |
| 3 | Nausea and organ disease | 3 vomits in 6 h, yellow foam, kidney values 3 times normal | 6 h | 20-40 ml/h | 6 |
| 4 | Brain and nerve | Head tilt 20 degrees, 1 seizure, pupils 2 different sizes | 30 min | 40-80 ml/h | 7 |
Tier 1, the mouth. Most drooling cats are dental cats. Look for a 2 to 5 mm red line at the gum margin, brown tartar on the upper fourth premolar, or a 1 cm strand of string at the base of the tongue.
Tier 2, the toxin. The classic is a pyrethroid flea product made for a dog, applied between a cat's shoulders: 1 drop is enough for tremors, 12 to 24 hours of drooling and a 40 C temperature. Lilies, permethrin sprays and 1 tablet of a human painkiller belong in the same group.
Tier 3, the gut and organs. Nausea makes thin, watery saliva in volume, often with lip smacking 10 to 20 times a minute. Kidney disease, pancreatitis, liver disease and a stuck hairball look alike at home, which is why the blood panel settles it.
Tier 4, the brain. A seizure, vestibular disease or a head injury can leave a cat drooling and unable to swallow for 30 to 60 minutes. A head tilt, nystagmus or 1 dilated pupil is not a dental case.
What the mouth tells you in 60 seconds
Put 1 hand over the head, thumb behind the last upper tooth, lift the chin; most cats give you 5 to 10 seconds, which is enough. Read 6 places: lips, gums above the 4 canines, hard palate, cheek pouches, the floor of the mouth and under the tongue. Gums that refill in under 2 seconds are normal; white, blue or brick-red with a 3-second refill needs the 30-minute line. A 5 mm grey plaque is tartar, a 2 mm ulcer hurts, and a 1 cm string is a foreign body: stop looking and drive.
The 7 things to write down before you drive
- Start time to the minute, plus 1 photo of the wet fur and 1 of the mouth.
- Saliva weight: dry towel, 10-minute wipe, 1 g equals 1 ml, 3 readings.
- Breathing: count 30 seconds at rest and double it; over 40 goes on the top line.
- Swallowing: gulps per minute; 10 or more means the cat cannot clear its own mouth.
- Vomiting: count in 6 hours, and whether it was food, foam or bile.
- Exposure: every product, plant and pill from the last 6 hours, with label photos.
- Intake: grams eaten and ml drunk in 24 hours; a 4 kg cat needs 200 to 240 ml a day.
Four things not to do on the way
Do not make the cat vomit. In cats, 3 percent hydrogen peroxide inflames the stomach lining and causes more vomiting than it prevents. Do not pour water or milk into the mouth. A cat that cannot swallow will inhale 20 ml and trade drooling for pneumonia 24 to 48 hours later; offer a shallow 2 cm bowl and let it choose. Do not use a finger or tweezers under the tongue. That space is 3 cm deep, bleeds easily, and a 1 cm bone pushes in further, not out. Do not give a human antihistamine or an anti-nausea tablet. One tablet is enough for 12 hours of agitation in a 4 kg cat, and sedation hides the gait and eye signs the vet needs at 20:00.
The 2 checks that settle most first visits
Check 1 is the mouth and throat exam: 60 seconds with a light and a tongue depressor, 6 sites, plus a feel under the chin for a 1 cm swelling. Check 2 is blood: BUN, creatinine, ALT, potassium, glucose and total protein, read on an in-house analyser in 15 to 20 minutes, with a temperature taken at the same time. X-rays, 2 views, are added only when a foreign body is suspected.
The first 24 hours at home
Feed 10 to 15 g of wet food every 2 hours for 6 hours and count the swallows; 40 g in 24 hours is holding its own. Wipe the chin every 30 minutes for 3 hours and weigh the towels: under 20 ml in 3 hours is settling, over 40 ml is a call back. If the cat has not eaten by hour 12, vomits 2 more times, or breathes over 40, go back the same night rather than waiting for 09:00.
Five steps for tonight
- Photograph the mouth and the wet fur at minute 1; note the clock time.
- Weigh a towel, wipe for 10 minutes, weigh again, write the ml figure down.
- Count breaths for 30 seconds and gulps for 60 seconds; over 40 or over 10 changes the plan.
- Collect every label, plant cutting and pill bottle from the last 6 hours into 1 bag.
- Call the clinic with 4 numbers: start time, ml per 10 minutes, breaths per minute, vomits in 6 hours.
Two pages are worth opening while you wait: sudden facial swelling is covered in swollen face in cats, and the plant and product list lives in the toxin checker.
Terms mentioned in this article
Frequently asked
How fast does a drooling cat need to be seen?
Breathing over 40 a minute, an open mouth at rest, a swollen face or a known toxin exposure means 30 minutes, because a button battery burns through the esophagus in about 2 hours. A cat that is alert with normal breathing and only a wet chin can wait 2 to 4 hours. Three days of on-and-off drooling in a cat still eating is a dental visit within 72 hours.
How do I measure how much saliva is actually coming out?
Weigh a dry paper towel on a kitchen scale, wipe the chin for 10 minutes, then weigh it again. One gram of gain is about 1 ml. Take 3 readings an hour apart. Under 5 ml per 10 minutes is a same-day appointment; over 15 ml, or a cat that cannot swallow, is the 30-minute line.
Why should I not rinse the mouth or give water by syringe?
A cat that cannot swallow will inhale the liquid and develop pneumonia 24 to 48 hours later. A 20 ml syringe of water is enough to do it. Offer a shallow 2 cm bowl and let the cat choose, and never use a finger or tweezers under the tongue, where a 1 cm bone can be pushed deeper.