Why Are Shallots Harmful for Pets?

Shallots are potent alliums with high levels of toxic sulfides that destroy red blood cells, mimicking onion toxicity but often hitting harder gram-for-gram. Expect symptoms like panting, pale mucous membranes, bloody urine, and severe weakness 2 to 4 days post-ingestion. A single shallot can poison a small dog (toxicity around 5 grams per kg), and cats suffer similarly from tiny amounts in recipes. Banish them from pet-accessible areas and treat exposures as emergencies with IV fluids and supportive care.