
Why Grapes and Raisins Remain One of the Highest-Risk Food Toxins for Dogs
What makes grape toxicity unpredictable, which symptoms matter first, and how to respond fast.
Marcus Thorne
Safety Alert Specialist
DVM, Emergency & Critical Care
Safety Alert Specialist
Marcus Thorne is an emergency veterinarian who has spent over a decade on the front lines of animal emergency care. Working in busy urban ERs, he has treated countless cases of pet poisoning and dietary emergencies, giving him firsthand knowledge of the dangers lurking in everyday foods. Marcus joined PetDietSafety to help prevent these emergencies before they happen. His Safety Alerts column provides critical, potentially life-saving information about toxic foods, harmful substances, and emergency protocols. When he's not writing or treating patients, Marcus volunteers with local animal rescue organizations and advocates for better pet food safety regulations.

What makes grape toxicity unpredictable, which symptoms matter first, and how to respond fast.
Marcus Thorne
Safety Alert Specialist