All members of the allium family (onions, garlic, shallots, chives, leeks) are toxic. They damage red blood cells and can cause anemia.
Dogs
Emergency risk
Cats
Emergency risk
Risk level
Danger
Symptoms
Lethargy, weakness, pale gums, red urine, vomiting, breathlessness
What to do now
Contact your vet immediately. Severe cases may require blood transfusion.
Use these hub pages for broader dog, cat, cleaner, and emergency planning guidance.
Compare Onions with common dog food, plant, medication, and household toxicity risks.
Open hubCat poisoningSee cat-specific guidance for Onions, plants, cleaners, foods, and medication risks.
Open hubEmergency planningPlan for emergency exams, toxin ingestion care, hospitalization, and insurance decisions.
Open hubLethargy, weakness, pale gums, red urine, vomiting, breathlessness
Contact your vet immediately. Severe cases may require blood transfusion.
Plan ahead for emergency vet bills
Poisoning, broken bones, and emergency surgery can get expensive quickly. Compare costs and accident coverage before you need it.
A one-page checklist for symptoms, product labels, emergency contacts, and what to bring to the clinic.
Grapes and raisins are highly toxic to dogs and cats. They can cause acute kidney failure even in small amounts.
Carrots are a healthy, low-calorie snack. Crunchy texture helps clean teeth.
Garlic is toxic to dogs and cats. It damages red blood cells, leading to anemia.
Broccoli is safe in small amounts. Contains isothiocyanates which can cause gastric irritation in large amounts.
Wild mushrooms can be highly toxic. Store-bought mushrooms are generally safe, but wild ones should always be avoided.
Spinach contains oxalates which can cause kidney issues in large amounts.