Why 4 kg makes this lick lethal
A cat's tongue has hundreds of hooked papillae that trap liquids efficiently—what looks like a casual lick could mean she ingested droplets equal to her weight in toxin. At 4 kg, her nervous system has no reserves to buffer the attack. Signs often start with pupils shrinking to pinpoints, then progress to vocalizing from muscle pain within an hour.
Isolate her immediately in a hard-sided carrier (not a fabric crate—seizures can make cats thrash violently). Line it with pee pads—organophosphates trigger uncontrollable urination that could spread contamination. Keep other cats out of any room she's been in since exposure.
Handling a multi-cat contamination risk
Wipe down all surfaces she touched with soapy paper towels (not reusable cloths), focusing on windowsills and floor edges where pesticide residue might linger. Check the other cats' paws for granules—their grooming habits mean even walking through contamination risks ingestion.
If the exposed cat vomited, wear gloves to clean it up with baking soda to neutralize acidity. Don't let other cats investigate the smell—organophosphate vomit remains toxic. Wash your hands before handling food bowls to avoid cross-transfer.
Why small cats crash faster
A feline liver processes toxins differently than dogs', with fewer detoxifying enzymes. What might cause tremors in a dog can trigger full seizures in a cat within 90 minutes. Her small size also means body temperature plummets dangerously fast once symptoms start—wrap her carrier in a towel for transport, but avoid direct heating pads.
Vets may administer lipid therapy intravenously—fat molecules that bind the poison—but this works best within the first hour. Time matters more than visible distress; some cats appear calm while their diaphragm muscles are paralyzing.
Long-term multi-pet precautions
After treatment, keep the exposed cat separated for 48 hours—her feces may contain excreted toxins dangerous to others. Use disposable litter boxes and change them after each use. Monitor all cats for subtle signs like excessive blinking or reluctance to jump—these can indicate mild exposure in others.
Replace any houseplants that were sprayed, even if you think they're clean. Cat claws can scratch pesticide residues from leaves days later. Consider using only pet-safe pest control like diatomaceous earth for future infestations.
The step-by-step response, from the first minute to the vet visit, is in our Organophosphate Insecticide Toxicity in Dogs and Cats emergency guide.