Food allergies in dogs are on the rise. It is estimated that 10-15% of dogs with chronic skin issues have a food allergy, often undiagnosed for years.
Typical Symptoms
- Chronic itching, especially on paws, face, armpits, groin
- Recurring ear infections (even unilateral, even without other skin symptoms)
- Chronic diarrhea or soft stools
- Intermittent vomiting
- Dermatitis that does not respond to standard therapies
- Obsessive licking of paws
Unlike environmental allergies, food allergies are not seasonal: symptoms are consistent throughout the year.
The Most Common Allergens
In order of frequency:
- Beef (allergen #1 in dogs)
- Chicken
- Dairy
- Egg
- Wheat, soy, corn
- Fish
- Lamb, pork
They are often allergies to proteins, rarely to grains (contrary to common myth).
Diagnosis
The only certain way to diagnose a food allergy is through an elimination diet:
- 8-12 weeks with a "novel" food (protein never eaten before) — rabbit, duck, horse, unusual fish, or hydrolyzed diet
- NOTHING else: zero snacks, zero leftovers, zero chew toys, zero flavored tablets
- Check for improvement after 8-12 weeks
- If improvement occurs: reintroduce one food at a time for 2 weeks, identifying the culprits
Blood tests are not very reliable for food allergies. Don’t skip them entirely, but the gold standard remains the diet.
Long-term Management
Once the allergen is identified:
- Specific food that excludes it
- Compatible snacks (same protein as the food, no "generic poultry")
- Be cautious of flavored medications (some antiparasitic tablets contain chicken)
In Conclusion
A dog with chronic itching deserves a diagnosis. It is often a food allergy that can be resolved with the right dietary change. Talk to your veterinarian about an elimination diet: 12 weeks of commitment can change 10 years of quality of life.
