Dog Ate Onion? Toxic Dose, Symptoms by Hour, and the ER Window (2026)
Onion is one of the most dangerous foods in your kitchen for dogs — and the most deceptive, because the worst damage happens invisibly over 1 to 5 days after the meal. This 2026 emergency guide covers the exact toxic dose by body weight, why cooked onion is just as dangerous as raw, the two-wave symptom timeline that catches most owners off guard, the breeds that react at lower doses, and what your vet will do in the first 4 hours.
