ONIONS, GARLIC, CHIVES & LEEKS
When onions and garlic are ingested in large or chronic amounts, it results in Heinz body formation and anemia. Cats and Japanese breeds of dogs (Akita, Shiba Inu, etc) are even more sensitive to the effects of these plants. Plus, cats are more sensitive than dogs to Allium toxiciosis. Clinical signs are generally secondary to the anemia, with resultant weakness, lethargy and pale mucous membranes.
Avoid using onion or garlic powder chronically in pet food, and make sure your pet doesn’t ingest large amounts! Clinical signs are onion/garlic smell on breath, lethargy, pale mucus membranes (due to anemia), tachypnea (elevated respiratory rate), tachycardia (elevated heart rate), vomiting, and a reduced appetite. Rarely, hypoglycemia (low blood sugar).