The critical 48-hour window post-treatment
Your 5 kg cat may seem stable now, but taxine alkaloids can cause rebound cardiac effects up to two days after exposure. The veterinary treatment she received likely included intravenous fluids and medications to counteract the toxins, but some compounds linger in tissues and re-enter circulation over time. This is why continuous monitoring is essential — her smallest symptom could signal a developing crisis.
Set up a quiet recovery area where you can observe her without disturbance. Keep other pets away to reduce stress on her heart. Note her normal resting respiratory rate (count breaths per minute while she sleeps) so you'll recognize if it increases — rapid shallow breathing often precedes collapse in yew poisoning cases.
Relapse signs that demand immediate action
Watch for subtle changes like hesitation before jumping onto familiar surfaces or taking longer naps than usual. Cats hide illness instinctively, so these small behavioral shifts may be your only warning before severe symptoms appear. Check her gums every few hours — press gently to see how quickly the pink color returns after you lift your finger (capillary refill time). Delayed refill (over two seconds) means her circulation is weakening.
Vomiting after hospital discharge is particularly concerning because it suggests either lingering gastrointestinal irritation or worsening cardiac function reducing blood flow to her stomach. Refusing favorite treats is another red flag — cats with compromised circulation often lose their appetite entirely as their bodies prioritize vital organs.
Hydration and nutrition during recovery
Offer small amounts of water frequently rather than leaving a full bowl, as drinking too much at once could stress her system. If she hasn't eaten within 12 hours of coming home, try warming her food slightly to enhance the smell, but don't force-feed — appetite suppression may indicate underlying issues requiring vet attention.
Her kidneys and liver worked hard to process the toxins, so ask your vet about recovery foods that support these organs. Low-phosphorus options are often recommended post-poisoning. Track her litter box habits — decreased urine output or unusually concentrated urine can signal dehydration or kidney strain needing medical intervention.
Activity restrictions and follow-up
Limit vigorous play for at least a week, even if she seems energetic. The heart muscle needs time to fully recover after toxin exposure, and overexertion could trigger arrhythmias. Use interactive toys that encourage gentle movement rather than sprinting or leaping. Discourage climbing to high perches where a fainting episode could result in dangerous falls.
Schedule a vet recheck even if she appears perfectly normal after 48 hours. They may recommend blood tests to assess cardiac enzymes or an ECG to check for lingering rhythm abnormalities. Always mention this incident to future veterinarians — some cats develop increased sensitivity to certain anesthetics after yew exposure.
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.