How crushing amplifies the danger for a 20 kg dog
Five crushed pits release far more cyanide than whole ones because breaking the seeds' protective coating exposes the toxic core. Your dog's size provides some buffer, but the dose here likely crosses the risk threshold. Crushed material also absorbs faster — expect symptoms sooner than with intact pits, possibly within 30 minutes.
The stomach's acidity converts the crushed seed compounds into hydrogen cyanide gas, which can cause belching or reflux signs first. Your dog might smack its lips excessively or seem to gag without vomiting. These early warnings often precede systemic symptoms by mere minutes.
The progression timeline for this quantity
Initial signs typically involve oxygen hunger — restless pacing, exaggerated breathing motions, or unusual anxiety. Bright red gums develop as blood fails to oxygenate properly. At this stage, your dog may seek cool surfaces to lie on, as the toxin disrupts temperature regulation.
Within two hours, neurological effects emerge: dilated pupils that don't respond to light, stumbling, or head pressing. Five crushed pits could produce enough cyanide to cause seizures in a dog this size. The most critical period is between 45-90 minutes post-ingestion, when emergency intervention is most effective.
Why pit condition matters more than count
Freshness plays a key role — older dried pits contain less active toxin, while newly removed seeds from ripe fruit are most dangerous. Check whether these were store-bought pears (often treated to reduce pit toxicity) or backyard harvest. The presence of mold on pits introduces mycotoxins that compound the problem.
Note any remaining pit fragments in vomit or stool. Sharp edges from crushing can cause mechanical damage, complicating the poisoning with bleeding or perforation risks. If your dog chews vigorously, dental fractures may also be present, though masked by systemic symptoms.
Immediate actions while awaiting veterinary care
Prevent further activity — exercise increases oxygen demand exactly when the body can't supply it. Keep your dog in a dim, quiet space to reduce metabolic stress. Offer small amounts of water if they're alert, but don't force it, as aspiration risk is high with potential neurological impairment.
Collect samples of any vomit or stool containing pit material for the vet to assess toxin release. Monitor gum color and capillary refill time by pressing gently on the gums — normal pink should return within two seconds. Delayed refill indicates circulatory compromise needing urgent treatment.
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.