Why pear cores tip the scale for 4 kg cats
While both fruits contain cyanogenic compounds, pear seeds typically have 2-3 times more amygdalin than apple seeds by weight. For a small cat, that difference matters — the pear core's seeds could deliver a clinically significant dose where the apple core alone might not. The core's fibrous material also retains seed fragments, increasing contact time with digestive acids.
Size plays a role here too — a 4 kg cat has less blood volume to dilute toxins than a larger animal. Watch for subtle changes like her seeking cool surfaces to lie on (a sign the body's struggling with oxygen utilization) or unusual tail twitching (early neurological effects).
How intact versus chewed cores change the risk
If she crunched through the core, that's more concerning than if she mostly licked fruit flesh off intact seeds. Cats' back teeth can crush seeds enough to start amygdalin release without obvious chewing — check for seed debris in her bedding or favorite spots.
The core's freshness matters too — older, dried cores have more brittle seeds that break easily, while fresh ones may pass through whole. Since she ate both types, count this as exposure to multiple small toxin sources rather than judging either core in isolation.
Why no symptoms doesn't mean all clear
Cyanide poisoning can have a delayed onset, especially with smaller doses spread across two fruit cores. The first 8-12 hours are critical — monitor her breathing rate while sleeping (normal is 20-30 breaths per minute) and check gum color with natural light every few hours.
Don't rely on appetite as an indicator — cats may continue eating briefly even as toxins take effect. Instead, test her coordination with a favorite toy; subtle misjudgments in jumping or pawing can precede more obvious neurological signs.
When to worry about cumulative small exposures
If this is part of a pattern (say, she often steals fruit scraps), those repeated small doses could eventually overwhelm her detox capacity. Cats lack certain enzymes to neutralize plant toxins efficiently, so what seems like "just a little" adds up faster than with humans or dogs.
Mark today's incident and watch for recurrence — three or more fruit core exposures in a month warrants vet discussion even without symptoms. For now, keep her hydrated to help flush any released toxins, but avoid milk or dairy which can slow digestion when you want things moving through.
The step-by-step response, from the first minute to the vet visit, is in our Pear Pits and Seeds Poisoning in Dogs and Cats emergency guide.