Is elderberry toxic to horses

Elderberry (Sambucus) is considered potentially toxic to horses, particularly the seeds, leaves, and unripe berries, which contain cyanogenic glycosides that can cause cyanide poisoning. Symptoms of poisoning may include difficulty breathing, tremors, and gastrointestinal distress. However, ripe Elderberries are generally safer in small amounts, and some horses may tolerate them without issue. It's best to consult a veterinarian before allowing horses to consume any part of the elderberry plant.