What do food allergies look like in dogs?

Many dog owners brush off occasional scratching as just “dog behavior,” but persistent itching often signals something more—like a food allergy. Common triggers include proteins like chicken, beef, or dairy, and the reactions usually show up on the skin first. In places like New York or Paris, vets report seeing more cases in dogs fed popular kibble brands, so knowing the signs helps you act fast before discomfort worsens.

Skin issues are the most obvious red flag: your dog might chew their paws raw, rub their face on the carpet, or develop red, inflamed patches (called hot spots). A colleague’s French Bulldog started losing fur around his belly after switching to a new salmon-based food—turns out, he was allergic to fish. These symptoms aren’t just painful; they can lead to infections if left untreated, which may require vet care to avoid violating local pet welfare standards.

Digestive problems often go hand-in-hand with food allergies too. You might notice frequent diarrhea, vomiting, or gassiness shortly after mealtime. Puppies are especially sensitive—my neighbor’s Labrador pup had ongoing stomach upsets until they cut wheat from her diet. In some regions, like California, neglecting a dog’s chronic health issues (like untreated allergies) could raise concerns with animal control, as it’s seen as failing to meet basic care obligations.

Ear infections are another common sign, especially in floppy-eared breeds like Cocker Spaniels or Basset Hounds. If your dog shakes their head nonstop, scratches at their ears, or has a foul-smelling discharge, a food allergy might be the cause. Vets in London often link these infections to grains or soy in dog food, and treating the allergy is key to preventing recurring ear issues that can lead to hearing problems.

Figuring out the allergen takes patience—start by switching to a limited-ingredient diet (LID) with a protein your dog hasn’t had before, like duck or venison. Keep a log of meals and symptoms for 4-6 weeks; if itching or stomach issues ease, you can slowly reintroduce old foods to pinpoint the trigger. Avoid giving table scraps, too—many human foods (like cheese or eggs) are common allergens and can derail your progress.

Recognizing food allergies in dogs isn’t just about relieving their discomfort—it’s part of meeting your legal duty as a pet owner to provide proper care. By watching for skin, digestive, or ear issues, and working with your vet to adjust their diet, you’ll keep your dog healthy and avoid run-ins with local regulations. A happy, itch-free dog is a sign of responsible ownership, and that’s something every community values.