Why it's dangerous
Phosphides react with stomach acid to release deadly phosphine gas; the presence of food in the stomach increases gas production and toxicity.
Toxic compound: Phosphine gas
Good to know
Phosphine gas is toxic to humans; if the pet vomits in a car, ensure windows are open. There is no specific antidote for this poisoning.
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.