Signs Your Dog Has a Food Allergy (And What to Do About It)

If your dog seems constantly itchy, has recurring ear infections, or regularly suffers from an upset stomach, food could be the culprit. Dog food allergies and intolerances are more common than most owners realise — and they’re frequently misdiagnosed or put down to ‘sensitive skin.’ The good news is that with the right diet, most dogs see a dramatic improvement.

What is a Dog Food Allergy?

A food allergy occurs when your dog’s immune system reacts to a specific ingredient — usually a protein — treating it as a threat. This triggers inflammation, which can show up in the skin, gut, ears and paws. It’s worth distinguishing between a true allergy (an immune response) and a food intolerance (a digestive reaction). Both cause discomfort and both are often resolved by changing the diet.

The Most Common Signs of a Food Allergy in Dogs

• Itchy skin — especially around the face, paws, ears, armpits and groin

• Recurring ear infections — often one of the first signs owners notice

• Red, irritated or flaky skin

• Paw licking or chewing — a tell-tale sign of systemic inflammation

• Loose stools, diarrhoea or vomiting — particularly after meals

• Excessive wind or bloating

• Dull, dry or thinning coat

What Are Dogs Most Commonly Allergic To?

The most frequent culprits are beef (the most common protein allergen in dogs), chicken, wheat and gluten, dairy, soy and eggs. Dogs tend to develop allergies to proteins they’ve eaten repeatedly over a long period — so a dog on the same chicken-based kibble for years may eventually react to it.

What to Do If You Suspect a Food Allergy

The gold standard is an elimination diet — stripping the diet back to a single novel protein and carbohydrate for 8–12 weeks, then reintroducing ingredients one at a time to identify the trigger. During an elimination trial: avoid all treats, chews and table scraps; stick strictly to the new food for the full trial period; note any changes in symptoms week by week.

What to Feed a Dog with Allergies

Look for foods that are single protein source, grain free and wheat-gluten free, and free from artificial additives. Our Salmon & Potato Grain Free Dog Food is a great starting point — salmon is a novel protein for most dogs, naturally rich in omega-3 to soothe inflamed skin, and completely grain and wheat-gluten free. Our Turkey & Veg Grain Free recipe is also ideal for dogs who’ve been on chicken long-term.

For allergy-safe treats, our 100% single protein training treats contain only one ingredient per flavour — safe for dogs on elimination diets. Our single protein food toppers are also safe for use during elimination diets.

If you’re unsure where to start, get in touch — we’re happy to help you find the right food for your dog’s needs.

Frequently Asked Questions

How long does an elimination diet take? A minimum of 8 weeks, ideally 12. This is the time needed for the immune system to settle and for symptoms to resolve if diet is the cause. Shorter trials are inconclusive.

Can my dog suddenly develop an allergy to food they’ve eaten for years? Yes — this is one of the most common patterns. Dogs develop intolerances to proteins they’ve eaten repeatedly over a long period. If your dog has been on the same food for years and is developing new symptoms, the food is often the first place to look.

What protein should I use for an elimination diet? Choose a protein your dog has never eaten before. Common choices are salmon, turkey, duck, venison or rabbit. Our Salmon & Potato and Turkey & Veg recipes are both popular choices for elimination diets.

Sample bags available across our range — delivered throughout Northern Ireland from our base in Comber, Co. Down.