Onion & Garlic Toxicity Calculator
Allium (onion, garlic, leek, chive) risk for dogs and cats.
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How this is calculated
Allium species contain organosulfur compounds that cause oxidative damage to red blood cells (Heinz body anaemia). Cats and Japanese breeds (Akita, Shiba) are more sensitive; small repeated doses accumulate.
Source-based educational tool; not independently reviewed by a veterinarian. Cited guidance does not imply endorsement by its authors.
Formula
Onion-eq (g/kg) = grams × factor ÷ weight kg (onion 1 · garlic 5 · powder 10) Toxic ≥ 15 g/kg dogs · ≥ 5 g/kg cats
Assumptions
- •Garlic ≈5× and dried powder ≈10× as potent as fresh onion
- •Single exposure; repeated small doses accumulate