Food Allergies in Dogs in 2025: Vet‑Reviewed Guide to Symptoms, Diagnosis & Management 🍽️🐶

In this article
Food Allergies in Dogs in 2025: Vet‑Reviewed Guide to Symptoms, Diagnosis & Management 🍽️🐶
By Dr. Duncan Houston BVSc
🔍 What Are Food Allergies?
Food allergies (adverse food reactions) happen when a dog’s immune system overreacts to a protein or other ingredient—most commonly beef, chicken, dairy, wheat, soy, or eggs.
⚠️ Common Signs to Watch For
- Itchy, red skin—especially paws, ears, face.
- Frequent ear or skin infections and hair loss.
- Licking or chewing paws, greasy coat, and dandruff.
- Digestive issues—vomiting, diarrhea, gas, soft stools.
🧬 Who’s at Risk?
Any dog can develop a food allergy at any age, though breeds like Labradors, Cocker Spaniels, and Westies are predisposed.
🩺 Diagnosis via Elimination Diet
The gold standard is an 8–12 week strict elimination trial using a novel (unfamiliar protein) or a hydrolyzed prescription diet. No treats or other foods allowed.
✅ Treatment & Diet Management
- Novel or hydrolyzed prescription diets—continue long-term if effective.
- Supplements: omega‑3 fatty acids, vitamins A/E, zinc support skin and gut health.
- Manage secondary infections with vet-prescribed antibiotics/antifungals.
- Concurrent allergy medications (e.g., Apoquel, Cytopoint) may help while diet changes take effect.
📅 Monitoring & Follow‑Up
- Expect gradual improvement—itch may ease in 4 weeks, full resolution may take up to 12 weeks.
- Reintroduce ingredients one at a time post-trial to confirm allergens under vet guidance.
- Ongoing vet checkups for coat, skin, ears, and GI health.
🔚 Final Thoughts
Food allergies can significantly affect skin and digestive health, but with a methodical elimination trial, prescription diet, and supportive care, most dogs can remain comfortable, itch-free, and healthy 🍃🐾.