Why the core is worse than just seeds for a senior cat
Pear cores are dense and fibrous, posing a serious intestinal blockage risk—especially for older cats with slower digestion. While the seeds contain cyanide compounds, the real danger here is mechanical: a core can lodge in the narrow feline digestive tract. Your cat's age means she's less able to pass it naturally, and her smaller body size makes even minor obstructions critical.
Watch for immediate signs like gagging, drooling, or repeated swallowing—these suggest the core might be stuck in her throat. If she's pawing at her mouth or seems distressed, don't wait: head to the emergency vet now. Even if she seems fine initially, blockage symptoms like vomiting or lethargy can take hours to appear.
What cyanide risk looks like in this situation
Crushed seeds release amygdalin, which converts to cyanide—but since your cat swallowed the core whole, the seeds may pass intact. However, stomach acid can partially break them down over time. Bright red gums, panting, or sudden weakness would signal cyanide exposure, which requires immediate antidote treatment at a clinic.
Don't rely on visible seed fragments in vomit or stool—by the time those appear, damage may be underway. Instead, time matters most: if it's been under 30 minutes, the vet might use safe methods to retrieve the core before digestion progresses. Bring a sample of the pear variety if possible—some cultivars have higher amygdalin concentrations.
The first hour with a potential blockage
Right now, prevent your cat from eating or drinking—this could push the core deeper or trigger vomiting that risks aspiration. Confine her to a small space with no bedding she might chew (swallowed fabric plus the core could twist the gut). Feel her belly gently for unusual hardness or vocalization when touched—a painful abdomen means go straight to the ER.
Call your vet even if she seems stable—senior cats often hide discomfort until they're critically ill. Describe exactly how large the core was (compare to common objects like a wine cork or thumb). Vets prioritize cases where the object's size relative to the patient suggests high obstruction risk, and your cat's age puts her in that category.
Why vomiting isn't a safe option here
Inducing vomiting could force the jagged core to scrape the esophagus or get lodged in the throat—a life-threatening complication. Unlike dogs, cats have delicate throat structures and are prone to aspiration pneumonia if they vomit improperly. The core's irregular shape makes it especially risky to bring back up.
Your vet may recommend imaging instead—X-rays can show where the core is stuck, and contrast studies track its movement. Surgery becomes more likely the longer it's inside, so don't adopt a wait-and-see approach. If your cat starts vomiting on her own, note whether anything comes up (dry heaving is particularly concerning) and collect a sample for the vet.
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.