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

Introduction

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 just put down to "sensitive skin."

The good news is that with the right diet, most dogs see a dramatic improvement. Here's what to look for and what to do about it.

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, but allergies tend to produce more severe symptoms.

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

• Scooting - dragging the bottom along the floor, often linked to gut inflammation

  
  

If your dog has several of these symptoms, especially the combination of itchy skin and digestive upset, a food allergy or intolerance is very likely worth investigating.

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

• Eggs

  
  

Interestingly, dogs tend to develop allergies to proteins they've eaten repeatedly over a long period, so a dog who has been 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 for diagnosing a food allergy is an elimination diet - stripping the diet back to a single novel protein (one your dog hasn't eaten before) and a single carbohydrate for 8–12 weeks, then reintroducing ingredients one at a time to identify the trigger.

Common novel protein choices include salmon, turkey, duck or venison. This is why single-protein, hypoallergenic foods are so valuable - they give you a clean starting point.

During an elimination trial:

• Avoid all treats, chews and table scraps (these can contain hidden allergens)

• Stick strictly to the new food for the full trial period

• Note any changes in symptoms week by week

  
  

If symptoms improve, you've likely identified a dietary cause. If they don't, it's worth speaking to your vet to rule out environmental allergies.

What to Feed a Dog with Allergies

Look for foods that are:

• Single protein source - so you know exactly what your dog is eating

• Grain free and wheat-gluten free - removes the most common grain-based triggers

• Free from artificial additives - these can also trigger reactions in sensitive dogs

• Hypoallergenic - formulated specifically to minimise common allergens

Our Salmon & Potato Grain Free Dog Food is a great starting point - salmon is a novel protein for most dogs, it's naturally rich in omega-3 to soothe inflamed skin, and it's completely grain and wheat-gluten free.

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.