Why it's dangerous
The clear liquid sap contains urushiol, which causes contact dermatitis upon skin exposure or gastrointestinal irritation if ingested.
Toxic compound: urushiol
Good to know
While dogs are less susceptible due to their fur, they can transmit the toxic oils to humans. Short-haired dogs are more at risk of skin reactions.
Sources
This page is informational and is not veterinary advice. If your pet has been exposed to something risky, contact your vet or an animal poison control line right away.