How daily cores turn a small risk into a big one
A single pear core might not overwhelm a 20 kg dog's detox capacity, but seven days straight is a different story. The seeds' amygdalin converts to cyanide gradually, and with repeated dosing, the body can't keep up. Think of it like filling a bucket with a slow leak—eventually, it overflows. Your dog's size buys some time, but not immunity.
The real danger is the crushing action during chewing—dogs rarely swallow seeds whole. Each bite releases more toxin than if the seeds passed intact. By day three or four, you might notice subtle changes like increased thirst or mild lethargy as his body struggles to process the load. These are warning signs, not just 'adjustment' to the new treat.
Why cumulative exposure changes the game
Cyanide's effects are dose-dependent over time—small amounts can be detoxified by enzymes like rhodanese, but this system gets saturated. With daily cores, the toxin builds up faster than his liver can neutralize it. Unlike one-time ingestions where symptoms appear within hours, this slow accumulation can delay visible signs until damage is underway.
Check his gums now—if they're pinker than usual or his breath smells faintly of almonds (a classic sign), don't wait. Even without symptoms, stop the cores immediately and call your vet. They'll likely recommend blood tests to check for methemoglobinemia (a cyanide-induced blood disorder) and organ function. Bring one of the cores to show seed size and condition.
The hidden risk beyond cyanide
Repeated seed ingestion isn't just about amygdalin—the fibrous cores can cause mechanical issues. Over a week, seed fragments might irritate the stomach lining or create partial blockages, especially if your dog gulps them. Watch for vomiting, reduced appetite, or straining to defecate—these could signal secondary problems developing alongside toxin buildup.
If he's had any prior digestive issues (even occasional gas), the cores could exacerbate them. The vet may suggest imaging if they suspect intestinal irritation from seed shards. Hydration is key—cyanide metabolism produces byproducts that tax the kidneys, so ensure he's drinking well. Switch to seedless treats like banana slices while his system recovers.
Post-exposure care for multi-day ingestions
After stopping the cores, monitor closely for 72 hours—delayed symptoms are possible with cumulative poisoning. His vet might prescribe liver-supportive supplements like SAMe or milk thistle, especially if bloodwork shows elevated enzymes. Don't be alarmed if he seems extra tired for a day or two—detoxification is energetically costly.
Ask about a follow-up blood check in two weeks to confirm values are normalizing. For future snacks, stick to peeled pear flesh (no cores or stems) in moderation—or safer alternatives like carrots. Remember that 'natural' doesn't always mean harmless—dogs lack our dietary adaptations for certain plant compounds.
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.