How puree speeds absorption versus dry food
Mixing the supplement into meat puree means your 4 kg cat absorbed nearly all the vitamin A immediately — unlike dry food that might trap some in crumbs. The wet food's fat content also enhances absorption, pushing more of the dose into their system faster. This creates sudden strain on their small liver.
Check the supplement's strength — human-grade vitamins often contain 10,000 IU or more per dose, far exceeding feline needs. Even if they only ate half the portion before you noticed, that could be dangerous for their size. The first warning sign is usually refusing their next meal entirely.
Why stolen meals complicate dosing guesses
Unlike planned supplement doses, you can't be sure how much they actually consumed from the puree. Cats often lick bowls clean, but some may leave traces. Look for oily residue around their mouth or on paws — this suggests they ingested most of it.
Assume worst-case exposure unless you saw them walk away mid-meal. Their grooming habits mean they'll ingest any supplement clinging to fur over the next hours, creating ongoing low-level exposure on top of the initial dose.
The critical window for preventing organ damage
First six hours matter most — vitamin A begins accumulating in liver cells rapidly. If caught early, vets can use specialized treatments to help protect the liver from overload. After twelve hours, the focus shifts to managing symptoms as the excess slowly metabolizes.
Watch for subtle behavior changes like hiding more than usual or resisting being picked up (possible joint pain). Unlike typical stomach upset, vitamin A toxicity rarely causes diarrhea early on — vomiting or total food refusal are more telling first signs.
Longer-term risks beyond immediate symptoms
Even if they seem fine in 48 hours, schedule a vet check within the week. Chronic vitamin A toxicity can manifest as skin lesions or abnormal bone growth over time. Kittens are especially vulnerable to growth plate damage from single large doses.
Until cleared by your vet, avoid all fish oils or liver treats — their system needs time to fully process this incident. Document the supplement's exact name and strength for your records, as future sensitivity is possible after an overdose event.
The step-by-step response, from the first minute to the vet visit, is in our Vitamin A Toxicity in Dogs and Cats emergency guide.