Why two berries still threaten a 5 kg frame
A small dog's body processes toxins more intensely—those two yew berries deliver a higher poison-per-kilo dose than the same amount would in a larger breed. Vomiting helps, but taxines absorb rapidly; what remains in his system now attacks heart muscle cells silently.
The berries' ripeness changes the risk. Unripe green berries contain more concentrated taxines than red ones, but both varieties carry enough poison to disrupt delicate cardiac rhythms in a petite patient.
The deceptive calm after vomiting
Initial vomiting often gives owners false confidence that the danger has passed. In reality, yew's alkaloids continue circulating for up to three days, sometimes causing sudden collapse when stomach symptoms have resolved. Your 5 kg dog might seem tired but stable, only to develop fatal arrhythmias hours later.
Track his resting respiratory rate—count breaths per minute while he sleeps. Any increase over 30 suggests his heart struggles to oxygenate blood efficiently, demanding immediate re-evaluation.
Monitoring tricks for the 48-hour window
Set hourly alarms overnight to check his gum color and capillary refill time. Press gently on his gums—they should pink up within two seconds. Delayed refill or a bluish tint means his circulation is faltering, even if he's still mobile.
Keep a log of water intake and urine output. Taxines can damage kidney tubules, making him produce more dilute urine despite drinking less. Weigh him daily—sudden weight gain might indicate fluid retention from heart strain.
Behavioral red flags post-discharge
Subtle changes often precede crisis in small dogs. If he stops jumping onto furniture he usually scales easily, or pants after mild play, his heart may be struggling. Yew's toxins sometimes cause intermittent weakness—one moment he trots normally, the next his hind legs briefly buckle.
Prepare a quiet recovery space away from stairs or excitement. Even happy stress like greeting visitors can trigger arrhythmias in the fragile post-toxin period. Use baby gates to enforce rest if he's normally energetic.
The step-by-step response, from the first minute to the vet visit, is in our Yew Plant Toxicity in Dogs and Cats emergency guide.