Food allergies in cats

Last updated: November 15, 2026

A general safe-food label cannot tell you whether an ingredient suits your own pet.

By Madhuri, pet lover and site editor. Educational summary based on published references; not veterinary advice. For advice about your own pet, contact your nearest vet.

Allergy, intolerance or poisoning?

Allergy involves the immune system. Intolerance is a different adverse reaction, such as difficulty digesting lactose. Poisoning involves a harmful substance. These terms are not interchangeable.

When to contact your vet

Persistent itching, recurring ear problems, skin damage or digestive symptoms deserve an assessment. Symptoms alone cannot identify an allergy. Suspected poisoning needs urgent veterinary guidance.

Diet trials

Your vet selects an elimination diet and supervises a later food challenge. Treats, supplements and flavoured medicines can introduce other ingredients: discuss them all with your vet. Do not choose a trial diet using this site's verdicts.

Prepare for the appointment

Bring food labels and notes on meals, treats, medicines and symptoms. Our printable diary helps organise this information; it does not diagnose allergy.

Source

Merck Veterinary Manual: Cutaneous Food Allergy. Editorial policy.