Mijn Hond At Uien: Wat Nu Te Doen
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Wat Nu Te Doen
- 1
Call Your Vet
Contact your veterinarian or ASPCA Poison Control at (888) 426-4435. Note the amount and type of onion consumed.
- 2
Vet May Induce Vomiting
If ingestion was recent (within 2 hours), your vet may induce vomiting to prevent further absorption of thiosulfate compounds.
- 3
Monitor for Anemia Symptoms
Watch for weakness, pale gums, rapid breathing, and reddish-brown urine over the next 1-3 days.
- 4
Blood Work May Be Needed
Your vet may recommend a CBC blood test to check for Heinz body anemia, which confirms onion toxicity.
De Wetenschap Erachter
Uien bevatten thiosulfaatverbindingen (n-propyl disulfide) die honden niet kunnen metaboliseren. Deze verbindingen veroorzaken oxidatieve schade aan rode bloedcellen, waarbij Heinz-lichamen gevormd worden — beschadigd hemoglobine dat neerslaat in de cellen. De milt vernietigt dan deze beschadigde cellen, wat leidt tot hemolytische anemie. Dit proces duurt 1-3 dagen, wat de reden is waarom symptomen vertraagd zijn (ASPCA, 2023).
Veelgestelde Vragen
How much onion is toxic to dogs?
Onion toxicity occurs at approximately 0.5% of the dog's body weight. For a 20kg (44lb) dog, this equals about 100g (3.5oz) of onion. All forms are toxic: raw, cooked, powdered, and dehydrated. Onion powder is especially concentrated and dangerous.
How long after eating onion do symptoms appear?
Symptoms typically develop 1-3 days after ingestion as red blood cells are progressively destroyed. Early signs include weakness, pale gums, and reddish urine. Severe cases can lead to collapse and require blood transfusion.
Are all onion types toxic to dogs?
Yes — all Allium species are toxic: onions, garlic, leeks, chives, and shallots. Garlic is less toxic per gram but still dangerous in quantity. Cooking does not reduce toxicity. Onion powder is the most concentrated form.