Why diarrhoea signals more than stomach irritation
Loose stools three hours post-exposure indicate kerosene has moved beyond the mouth into the digestive tract, where it disrupts the intestinal lining. Unlike food-borne upsets, petroleum-induced diarrhoea often smells chemically sharp and may contain mucus. For a 5 kg cat, this fluid loss compounds dehydration risks from the toxin itself.
The diarrhoea also suggests she swallowed enough kerosene to trigger systemic effects, not just local mouth burning. Watch for streaks of blood — the colon's rapid contractions can scrape inflamed tissue. This distinguishes it from stress diarrhoea, which wouldn't appear so quickly after exposure.
The dangerous overlap with grooming behaviors
Cats instinctively clean kerosene from their fur using their tongues, creating a cycle of re-exposure. Diarrhoea starting this soon implies she's ingested far more than the initial lick through subsequent grooming. Check her chest and legs for oily patches you might have missed earlier.
Every grooming session also risks inhaling droplets. The combination of gastrointestinal distress and potential lung exposure makes this a dual threat. If she's smacking her lips excessively or shaking her head, it suggests mouth pain from repeated chemical contact.
How to assess hydration without forcing fluids
Pinch the skin at her shoulders — if the tent takes more than two seconds to flatten, she's losing fluids too fast. Sunken eyes or dry gums are late signs in cats. Offer electrolyte-enhanced water (unflavored pediatric types work) in a ceramic bowl, as plastic can retain kerosene odors that deter drinking.
Avoid milk or oily remedies — fats accelerate kerosene absorption. The priority is preventing shock while watching for respiratory complications. If she refuses all liquids but continues having watery stools, she'll need subcutaneous fluids from your vet to protect her kidneys.
Why tonight's sleep position matters
Elevate her bed slightly to reduce acid reflux that could bring up kerosene while she sleeps. Cats with developing pneumonia often sit in a hunched position or extend their necks abnormally. Place a baby monitor near her resting spot to catch nighttime coughing fits you might otherwise miss.
Diarrhoea that continues beyond eight hours likely indicates intestinal lining damage requiring prescription protectants. Don't use over-the-counter anti-diarrheals — they can trap toxins inside. The presence of any digestive symptoms actually increases the odds of concurrent lung issues, as both systems react to the same chemical insult.
The step-by-step response, from the first minute to the vet visit, is in our Kerosene Poisoning in Dogs and Cats emergency guide.