Saliva on the chin at the food bowl is a localizing sign: the cat wants to eat, starts to eat, and something in the mouth or throat stops it. It is rarely nausea, which comes with lip licking and a turned-away head instead. Three minutes of looking at 5 oral sites and 3 swallowing signs usually separates mouth pain from esophageal disease, and the gap between those 2 decides whether you have 24 hours or 2.
3 minutes, 5 oral sites
Wrap the cat in a towel with the front paws inside, use a torch or phone light, and lift the lip at the side rather than fighting the front. Look at 5 places, in this order:
- Gum line: red, swollen gum edges and brown tartar on the cheek teeth. Gingivitis this far back is painful enough to stop chewing.
- Cheek teeth, both sides: tooth resorption shows as a pink or red defect at the gum line, and it affects roughly 1 in 3 cats over 10 years.
- Tongue: lift the tip and look at the underside, where 10 cm of sewing thread or tinsel hides and cuts like a blade.
- Palate and back of the mouth: ulcers, a burn from chewing a cable, or a 1 cm mass at the base of the tongue.
- Jaw and face: asymmetry, swelling under the eye, or pain when you open the mouth more than 3 cm.
Stop at any point the cat panics: a 30-second look at 2 sites beats a 5-minute wrestle that teaches the cat to bite. Write down what you saw and what you could not see, because the second list decides whether the next step is sedation.
The 3 esophageal signs
If the 5 oral sites look clean, the problem is behind the mouth. Three signs point there:
- Regurgitation within 5 minutes of eating: food comes back in a tube shape, undigested, without the heaving of a vomit.
- Neck stretched forward and down while swallowing: the cat extends its neck, gulps 2 or 3 times, and gives up.
- Food or water out of the nose: a sign of a swallowing fault or a cleft, and a direct route to aspiration pneumonia.
Any 1 of the 3 changes the plan. Regurgitation means the food never reached the stomach, and a cat that regurgitates 3 times a day for 2 days is dehydrated and at risk of inhaling stomach contents. Water coming back through the nose is the most urgent of the 3.
Drool, regurgitate, or vomit
The 3 look different once you know the timing. Drool is saliva only, at the sight of food or during chewing, with no food in it. Regurgitation is food, within 5 minutes, with no warning and no belly movement. Vomit comes with 3 to 5 heaves, yellow bile or foam, and usually more than 15 minutes after the meal. Timing alone sorts most cases before you touch the cat.
One exception: a cat that drools and also passes yellow diarrhea for 3 days is not a mouth case. In that pattern the gut is the story and the oral exam is a detour.
The 24-hour observation window
Drooling that started today, with the cat still eating 75 percent of its ration and drinking normally, gets 24 hours of observation and nothing else. During those hours, log 4 things: how many times the cat approaches the bowl, the percentage actually swallowed, whether water goes down without the head tossing, and the number of soaked bibs (1 bib holds roughly 20 to 40 ml).
The 24 hours end early, and you go now, if any of these appear: refusal of water for 12 hours, 2 regurgitations in 24 hours, drooling with a swollen muzzle, or a temperature above 39.5 °C (103.1 °F). A cat that drools, paws at its mouth, and cannot swallow its own saliva is not in the observation group at all.
From 2 hours to 72 hours
The table assumes an adult cat with no known toxin exposure. If the cat chewed a lily, a cable, or a flea product made for dogs in the past 72 hours, check the toxin list, jump to the last row, and call first.
| What you see | Ration eaten | Hours since onset | Action window |
|---|---|---|---|
| Drool only while chewing, mouth looks clean | 75 to 100 percent | Under 24 | Log 24 hours, vet in 72 hours |
| Drops food, chews on 1 side | 50 to 75 percent | 24 to 72 | Vet within 24 hours |
| Regurgitates within 5 minutes, 1 to 2 times a day | 50 to 75 percent | 24 to 48 | Vet within 12 hours |
| Cannot swallow water, 2 regurgitations in 24 hours | Under 25 percent | 12 to 24 | Vet within 6 hours |
| Drool plus facial swelling, or 1 seizure | Any | Under 6 | Emergency now |
| Known toxin or cable chewing in the past 72 hours | Any | Any | Emergency now, call first |
The anesthesia exam threshold
An awake exam reaches the front teeth and the tip of the tongue, which is about 40 percent of the mouth. An exam under anesthesia is the right next step when 1 of 3 things is true: the cat has refused 3 awake attempts, drooling has lasted 7 days or more with a normal-looking awake exam, or a lesion is visible but its depth cannot be judged. That last case matters, because a tooth resorption that reaches the pulp needs a different plan from tartar.
The preparation is the same as any short anesthesia: fast 8 to 12 hours (water until 2 to 4 hours before), pre-anesthetic blood work, and a weight in kg for drug calculation. Dental radiographs add 10 minutes and find resorption under the gum line that no awake exam can see. Budget 800 to 2,000 CNY in China or 300 to 700 USD in the US for anesthesia, radiographs, and 1 or 2 extractions; a cleaning alone runs about half that.
What the lab work shows
Baseline values that change the plan: creatinine 0.8 to 2.4 mg/dL and BUN 16 to 36 mg/dL for kidney function before any anesthetic, potassium 3.5 to 5.5 mmol/L for a cat that has not eaten in 3 days, glucose 80 to 150 mg/dL (stress can push a healthy cat to 250), and total T4 1.0 to 4.0 µg/dL in cats over 8 years. A PCV under 30 percent or total protein under 6.0 g/dL argues for delaying anesthesia and finding the cause. Reference ranges differ by analyzer, so use the interval printed on the report in front of you.
4 steps tonight
- Do the 3-minute, 5-site check with a torch, and write down what you could not see.
- Weigh the cat and start the 24-hour log: approaches, percentage swallowed, water, soaked bibs.
- Photograph the mouth with a phone if the cat allows it; 3 photos beat a description at the clinic.
- Book the visit if the ration eaten drops under 75 percent, or if water has not gone down in 12 hours.
Terms mentioned in this article
Frequently asked
My cat drools only when it sees food. Is that a dental problem?
Usually yes, and the 5-site check finds it in 3 minutes. Look at the gum line, both cheek teeth, under the tongue, the palate, and the jaw for asymmetry. A cat that drools at the sight of food but chews on 1 side, drops hard kibble, and eats 50 to 75 percent of its ration most often has tooth resorption or gingivitis at the back of the mouth, which needs an exam under anesthesia to see and treat.
How do I tell regurgitation from vomiting without a vet?
Time it. Regurgitation comes within 5 minutes of eating, has no heaving, and the food is still tube-shaped and undigested. Vomit follows 3 to 5 heaves, usually more than 15 minutes after the meal, and contains bile or foam. One regurgitation a day for 2 days means the food is not reaching the stomach, and that cat needs a vet within 12 hours because of aspiration risk.
Is 24 hours of observation safe for a drooling cat?
Only if the cat still eats 75 percent or more of its ration, drinks without tossing its head, and has no facial swelling. Log approaches to the bowl and soaked bibs, since 1 bib holds 20 to 40 ml and 4 bibs a day is real fluid loss. Stop watching and go sooner if water is refused for 12 hours, 2 regurgitations happen in 24 hours, or the temperature passes 39.5 °C.