What type of compound do Tulip and Hyacinth bulbs contain that typically causes intense gastrointestinal upset?

Answer

Allergenic lactones

Tulips and Hyacinths contain allergenic lactones within their bulbs, which upon ingestion by a dog results in intense gastrointestinal upset.

What type of compound do Tulip and Hyacinth bulbs contain that typically causes intense gastrointestinal upset?
plantPoisonDog