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Shallots
Shallots
Shallots (Allium ascalonicum) are a member of the Allium family and severely toxic to cats. They contain the same organosulfur compounds as garlic, onions, and chives — N-propyl disulfide and related compounds that oxidise feline haemoglobin. Shallots are reportedly more potent than standard onions by weight, similar in toxicity level to garlic.
Important Notes
Toxic compounds: N-propyl disulfide and organosulfur compounds; all forms toxic — raw, cooked, pickled, and dried
Mechanism: oxidative damage creates Heinz bodies in red blood cells; haemolytic anaemia develops as affected cells are destroyed
Symptoms: lethargy, pale or yellowish gums, rapid breathing, loss of appetite, weakness, reddish-brown urine; symptoms often delayed 3–5 days
Shallots are concentrated in many sauces, dressings, and Asian dishes — never share seasoned food with cats
Contact your vet immediately if ingestion is suspected
Potentially Toxic Parts
Juice
Bulb
Powder
Possible Symptoms Reported in Cats
Tachypnea and Dyspnea (Breathing Difficulties)
Respiratory · After a lag of several days
Lethargy, Weakness, and Depression
Gastrointestinal · After a lag of several days (typically 2 to 5 days)
Pale Mucous Membranes and Jaundice (Icterus)
Gastrointestinal · After a lag of several days (typically 3 to 5 days)
Tachycardia (Rapid Heart Rate)
Cardiac · After a lag of several days
Hemoglobinuria (Dark Urine)
Gastrointestinal · After a lag of several days
Cold Sensitivity
Gastrointestinal · Several days after ingestion
Because shallots belong to the Allium genus
Metabolic
Vomiting, Diarrhea, Abdominal Pain, and Loss of Appetite
Gastrointestinal · Usually within 1 day (24 hours) of ingestion
Allium Breath Odor
Gastrointestinal · Shortly after ingestion
Disclaimer: This summary was compiled from multiple sources and is for informational use only. It is not a diagnosis or treatment plan. Toxicity can vary based on the substance, amount, plant part, and individual cat. If you think your cat may have been exposed to a toxic substance, contact a veterinarian right away.