Pet health
Signs your dog has a food allergy (and what to do next)
Food allergy searches spike around itching, ear infections, and GI upset — learn the signs and the right way to test.
5 min read
Educational information only — not veterinary medical advice. Always consult a licensed veterinarian for diagnosis and treatment.
True food allergies involve the immune system; food intolerances cause GI upset without the same mechanism. Both can make owners switch foods repeatedly without relief.
An elimination diet for 8–12 weeks (single novel or hydrolyzed protein, no unapproved treats) is how veterinarians actually diagnose allergies.
Common symptoms
- Itchy skin, paws, or ears — often year-round
- Chronic ear infections
- Soft stool or frequent bowel movements
- Rarely: vomiting immediately after a specific food
What not to do
Rotating grocery-store brands every week makes diagnosis harder. Stick to one vet-approved trial diet and document everything your dog eats, including flavored medications and dental chews.
Common questions
- Are blood tests for food allergies reliable?
- Vets generally prefer elimination trials over IgE food panels for dogs — ask what's appropriate for your case.