If your dog won’t stop chewing their paws or your cat keeps scratching at their face and neck, you know how frustrating — and heartbreaking — that can be. Itchy skin is not just a minor annoyance. It is often a sign of an underlying issue that needs attention.

At Grace Animal Hospital in Holly Springs, we frequently see pets struggling with chronic itching, recurrent ear infections, and irritated skin. One possible cause is a food allergy.

Here is what pet owners should know.

What Does a Food Allergy Look Like?

Food allergy is considered one of the itchiest conditions in dogs and cats. When a pet eats certain proteins, their immune system may eventually recognize part of that protein as a threat. The resulting inflammation often affects the skin, though the gastrointestinal tract can also be involved.

Common signs in dogs:

Facial itching
Chewing on feet or legs
Itchy anal area
Recurrent ear infections

Common signs in cats:

One important detail many owners do not realize is that food allergies typically develop after years of eating the same diet. They do not usually happen immediately after switching foods.

Is It Really a Food Allergy?

Not every itchy pet has a food allergy.

Pets can also be allergic to:

Flea bites
Environmental allergens such as pollen or dust mites
Multiple allergens at the same time

That is why proper diagnosis is essential. At Grace Animal Hospital, we take a thorough history, evaluate patterns, and rule out other causes before determining the next steps.

Clues that may point toward a food allergy include:

Itching that is not seasonal
Onset at a very young age or later in life
Poor response to corticosteroids
Gastrointestinal signs such as vomiting or diarrhea

Are Blood or Saliva Tests Helpful?

Many companies advertise allergy blood, hair, or saliva tests. However, these tests are not considered reliable for diagnosing food allergies. They may detect antibodies to foods your pet has eaten before, but that does not necessarily mean your pet is allergic to them.

The most accurate way to diagnose a food allergy is through a diet trial.

The Hypoallergenic Diet Trial

To determine whether food is the cause, we recommend a strict hypoallergenic diet trial.

Step 1: Feed a Special Diet for Eight Weeks

Most pets show improvement within three to four weeks, but the full trial should last eight weeks to ensure accuracy.

The diet must be followed strictly. This means:

No treats
No flavored medications
No rawhides or table scraps
No sharing food from other pets

All family members must be committed for the trial to work.

Step 2: Reintroduce the Original Diet

If symptoms improve during the trial, we briefly reintroduce the original food. If itching returns within two weeks, a food allergy is confirmed.

It takes commitment, but it is the only proven way to diagnose a true food allergy.

What Type of Diet Is Used?

There are two main approaches.

Novel Protein Diet

This uses a single protein your pet has never eaten before, paired with a single carbohydrate source.

Hydrolyzed Protein Diet

In this type of diet, proteins are broken down into very small molecules that are less likely to trigger the immune system.

Veterinary therapeutic diets are typically recommended because over the counter foods may contain trace protein contamination that can interfere with accurate results.

Why Flea Control Still Matters

Even if we suspect a food allergy, strict flea prevention is essential. Some pets have more than one allergy at the same time. Flea allergy combined with food sensitivity can significantly worsen itching.

At Grace Animal Hospital, we help create prevention plans tailored to your pet’s lifestyle here in Holly Springs.

What If the Diet Trial Does Not Work?

If symptoms do not improve and secondary infections have been controlled, environmental allergies may be the primary issue.

In those cases, we may discuss:

Targeted medications
Medicated bathing protocols
Long term allergy management plans
Advanced diagnostics if needed

Chronic itching is extremely uncomfortable. Our goal is always prompt relief while addressing the underlying cause.

How Grace Animal Hospital Can Help

At Grace Animal Hospital, we understand how frustrating chronic itching can be for both pets and their families.

Our approach is thorough, evidence based, compassionate, and individualized. We walk you through every step of a diet trial, help select the appropriate food, and monitor progress carefully so you are never navigating it alone.

If your dog or cat is struggling with persistent itching, recurrent ear infections, or unexplained skin issues, schedule an appointment with Grace Animal Hospital. We are here to help your pet feel comfortable again.

‍

Our Latest Stories

March 4, 2026