How this calculator works
Divide the estimated onion mass by body weight to give the clinician a consistent exposure measure. Do not compare powders gram-for-gram with fresh onions. Onion-associated red blood cell damage can become apparent days later, so a normal appearance now is not reassuring. No low-risk band or treatment dose is calculated.
Formula
Exposure (g/kg) = onion mass in grams / dog mass in kilograms. Body-mass fraction = onion kg / dog kg.
Worked example
For 100 g of onion eaten by a 10 kg dog, the exposure summary is 10 g/kg, equal to 1% of body mass. This number is not a safety limit. Contact veterinary help now.
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Frequently asked questions
Does cooking remove the concern?
No. Tell your veterinarian whether the product was raw, cooked, dried or powdered.
Can I use this for garlic or onion powder?
The arithmetic can record mass, but it cannot translate potency. Give the exact ingredient and packaging to animal poison control.
What if I entered zero because the amount is unknown?
Zero entered is not proof of no exposure. Call and explain what may have been eaten; do not wait for an exact measurement.