犬がタマネギを食べた：今すぐやるべきこと
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今すぐやるべきこと
- 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.
その背後の科学
タマネギには犬が代謝できないチオ硫酸塩化合物（n-プロピルジスルフィド）が含まれています。これらの化合物は赤血球に酸化損傷を引き起こし、ハインツ体を形成します—細胞内に沈殿する損傷したヘモグロビン。その後脾臓がこれらの損傷した細胞を破壊し、溶血性貧血を引き起こします。このプロセスには1-3日かかるため、症状が遅延します（ASPCA、2023）。
よくある質問
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.