Why mould amplifies the usual risks
That fuzzy patch contained millions of mold spores already breaking down the fruit's structure—essentially pre-digesting it into toxic byproducts. Unlike fresh persimmon irritation, mold introduces tremor-inducing compounds like penitrem A that attack the nervous system. For a 4 kg cat, even a grape-sized piece is dangerous when mold is involved.
The fruit's natural sugars accelerate mold growth, creating a double threat: gastrointestinal upset from persimmon's tannins plus potential neurological effects from mycotoxins. Check if the mold was white (less toxic) or green/black (higher risk)—but don't wait for symptoms either way.
First four hours: what to monitor closely
Mycotoxins absorb rapidly—initial signs may appear within 90 minutes. Watch for subtle changes like excessive whisker twitching or misjudging jumps onto furniture. These precede full-body tremors. The cat may also paw at its mouth—mold causes a bitter aftertaste that lingers.
Persimmon's fiber forms a gel-like mass when old, potentially sticking to the stomach lining. If you hear gurgling sounds louder than normal hunger growls, the digestive tract is struggling to process this combination. Don't induce vomiting—the mold spores could aspirate into lungs.
When neurological signs trump gastrointestinal ones
Typical persimmon ingestion causes vomiting or diarrhea, but mold adds unique dangers. Head tilting, dilated pupils that don't constrict in light, or sudden fascination with shadows indicate mycotoxin exposure. These require immediate intervention—unlike simple fruit toxicity.
The cat may seem 'drunk'—staggering but not collapsing. This distinguishes mold toxicity from persimmon's gut effects. Time matters: if neurological signs appear, the treatment window is under two hours before potential liver involvement.
Why you can't wait this out at home
Mold toxins compromise the blood-brain barrier, while persimmon's astringency dehydrates tissues—a dangerous combination. Even if symptoms seem mild (slight lethargy, reduced appetite), internal damage could progress silently.
Bring the moldy fruit's packaging if possible—different molds produce varying toxins requiring specific treatments. Don't offer food or milk—some mycotoxins are fat-soluble and this could increase absorption. Unlike fresh fruit mishaps, mold exposure always warrants professional detox support, even for stoic cats hiding their symptoms.
The full verdict, portion guidance and serving notes are collected on the Persimmon food facts page.