Why the sauce matters more than nut traces
Those few crushed cashews in the curry pose minimal fat risk to your 4 kg cat - it's the other ingredients that warrant attention. Thai green curry typically contains garlic, shallots, and lemongrass, all harder on feline systems than nut particles. Even a teaspoon of sauce delivers concentrated irritants cats rarely encounter.
The first red flag would be excessive lip-licking or pawing at the mouth within an hour - signs the spices are causing oral irritation. Unlike dogs, cats often hide nausea until they suddenly vomit with no warning. Check any vomit for specks of green herb matter that confirm she ingested more than just a casual lick.
The silent threat to feline blood cells
Onion and garlic compounds can damage cat red blood cells without immediate symptoms. Your cat might seem fine for 2-3 days before showing weakness or pale gums. Since the cashew fragments are irrelevant here, focus on monitoring for subtle changes in energy levels and gum color.
Press gently on her gums - they should return to pink within two seconds. Delayed capillary refill time or gums that look whitish instead of bubblegum pink indicate oxygen transport issues. Unlike digestive upset, this damage won't resolve without veterinary intervention.
Why water won't dilute the risk
Don't try to 'flush out' the curry by encouraging your cat to drink - this does nothing to neutralize onion toxicity and may cause water aversion. Cats process spices very differently than humans, and their livers lack certain detox enzymes. The small volume she ingested works against her - concentrated toxins in minimal liquid.
Watch the litter box for unusually dark urine (brownish rather than yellow) which signals red blood cell breakdown. Any change in litter clump texture could indicate dehydration from low-grade nausea you haven't witnessed directly.
When to override a cat's act
Cats are masters at masking illness until they can't anymore. If she sleeps in an unusually tight ball or chooses cool surfaces like tile when she normally prefers warmth, these are quiet distress signals. Her weight makes her especially vulnerable - 4 kg isn't enough body mass to buffer toxins effectively.
Refusing favorite treats (not just regular food) is a serious sign in cats. Unlike dogs who skip meals for minor reasons, cats rarely turn down special snacks unless they feel truly unwell. Trust this behavior over visible symptoms when deciding whether to call the vet.
The full verdict, portion guidance and serving notes are collected on the Cashews food facts page.