Cat Drooling: 4 Tracks, 3 Mouth Checks, 5 Severity Grades

A cat that suddenly drools is telling you one of 4 things: its mouth hurts, it feels sick, a nerve is damaged, or it swallowed something toxic. Which one it is shows up in 30 seconds of observation, because mouth pain comes with chewing on one side, nausea comes with lip licking and swallowing, nerve damage comes with a dropped eyelid or jaw, and poisoning usually comes with a story you can date to the hour.

The 4 tracks, and what separates them

Sort by the second sign before you sort by anything else. A cat with a painful mouth eats slowly, drops food, and drools more on the side of the lesion. A nauseated cat licks its lips 10 to 20 times a minute and swallows repeatedly, and drool is thin and clear. Nerve cases show asymmetry: 1 eyelid lower, 1 ear drooping, jaw hanging, or a tongue that will not retract. Toxicology cases are sudden, within 15 minutes to 12 hours of exposure, and often come with tremors, vomiting, or dilated pupils.

Track	Second sign to look for	Typical onset	Urgency
Mouth pain	Chewing on 1 side, dropping food, pawing the face	Days to weeks, worse over 1 to 2 weeks	Vet within 24 to 48 hours
Nausea	Lip licking 10 to 20 times a minute, repeated swallowing	Hours, comes in waves of 2 to 5 minutes	Vet same day if vomiting over 3 times
Nerve damage	1 eyelid or ear lower, jaw slack, no blink reflex	Sudden, over 1 to 24 hours	Vet within 24 hours
Toxin	Tremors, dilated pupils, vomiting, weakness	15 minutes to 12 hours after exposure	Emergency now

Poison first if there is any chance

Two household products account for most feline drooling emergencies. Pyrethrin and permethrin spot-on products made for dogs are the classic: cats lack the liver enzyme to clear them, and 1 dog-strength tube on a 4 kg cat can cause 12 to 48 hours of tremors and heavy drooling, sometimes seizures. Never use a dog flea product on a cat, and keep treated dogs apart for 48 hours. Lilies are the second: every part, including 2 grains of pollen on the fur, can cause kidney failure, and drooling is often the first sign within 1 to 6 hours, before vomiting at 12 to 24 hours. Wash the face and paws with mild soap, call poison control or the clinic, and bring the package. Check the plant against the toxic plant list rather than guessing from the name.

Drooling with a seizure: the first 5 minutes

Do not put fingers or a spoon in the mouth; cats do not swallow their tongues and you will be bitten. Clear 1 metre of floor space, dim the light, and note the start time to the minute. Most seizures stop in 30 to 120 seconds and the cat is disoriented for 5 to 30 minutes afterwards, which is normal. It is an emergency if a seizure passes 2 minutes, if a second one starts before the cat recovers, if there are more than 2 in 24 hours, or if the cat is not breathing normally 5 minutes after it ends. Heavy drooling plus a normal jaw and no tremor is often nausea or mouth pain, not a seizure, so film 20 to 30 seconds of the episode; that clip is worth more to the vet than any description.

3 places to look in the mouth at home

Wrap the cat in a towel so the front paws are inside, use a phone torch, and limit the exam to 10 seconds per site. Site 1, lift the lip and look at the gum line where tooth meets gum on both sides: a red line, a swollen margin, or brown tartar over 1 mm means dental disease. Site 2, press the chin down gently and look at the sides of the tongue and the floor of the mouth: bright red streaks or ulcers there suggest stomatitis, which is a whole-mouth problem, not 1 bad tooth. Site 3, look at the big back molars and the premolars just behind the fangs: a broken crown, a pink dot at the gum line, or a tooth that wobbles points to a fractured tooth or a resorptive lesion. Never open the jaw by force and never probe with a cotton bud.

Grading the drool so you can report it

Volume is the number triage needs and the one owners never measure. Use a 5-point scale, estimate in milliliters per hour by weighing a dry paper towel before and after, and note the grade each time you call.

Grade	What you see	Volume per hour	What it suggests
0	Dry chin, no wet fur	Under 0.5 ml	Normal
1	Chin fur damp, no drips	0.5 to 2 ml	Mild nausea or anticipation of food
2	Drips every 1 to 5 minutes, fur clumped	2 to 8 ml	Nausea, mild mouth pain, tooth root problem
3	Continuous string or thin stream	8 to 20 ml	Significant mouth pain, toxin, nerve lesion
4	Pouring, cat distressed, bedding soaked	Over 20 ml	Emergency; dehydration at 50 ml/kg a day

What actually helps tonight

1. Weigh the cat today; a 4 kg cat that drools at grade 3 for 24 hours can lose 3 to 5% of body weight in fluid. 2. Offer water in 3 shallow bowls and wet food warmed to body temperature, since smell drives appetite in a cat with a blocked nose or sore mouth. 3. Do not syringe water into the mouth of a cat that is drooling and unstable; it causes aspiration. 4. Keep the chin dry with a soft cloth to prevent skin scald under the jaw. 5. Book the dental exam within 48 hours if grade is 2 or higher and the cat is still eating, and go now if grade is 3 or 4 with vomiting, tremor, or a seizure. Most mouth-pain drooling in cats over 5 comes down to dental disease, and 1 scaling under anesthetic with 2 to 3 extractions typically resolves it in 7 to 10 days.

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