Five unusual allergy symptoms in dogs you might miss

When we think about allergy symptoms in either dogs or people, we tend to bring to mind a fairly generic cluster of stereotypical responses, such as sore, red and runny eyes, sneezing, and potentially, a rash or breakout of hives.

These are indeed symptoms of allergies that can present in dogs, but allergies can show in many forms, varying widely in presentation and severity, and may even change over time.

Dogs can be allergic to a broad range of allergens, not just pollen or airborne particles like dust and mould. Food, chemicals, and many other substances can trigger allergic reactions, making identification a challenge.

Discovering what causes a dog's allergy is often complex, and it begins with recognising the signs. If your dog's symptoms don't align with common allergy indicators, recognising allergic reactions can be even trickier. This article explores five unusual allergy symptoms in dogs to help you identify them early and seek appropriate care.

1. Sensitive Feet: More Than Just Ticklish

While many dogs dislike having their feet handled, an intense reaction to foot handling can indicate hypersensitivity due to allergies. Allergic reactions may make the paw pads itch, burn, feel sore or inflamed, or unusually sensitive, leading to discomfort beyond typical ticklishness.

In some cases, the dog's feet may appear swollen due to inflammation, causing further distress. This symptom warrants veterinary examination to rule out allergies or other underlying causes.

2. Frequent or Recurrent Ear Infections

Ear infections are notoriously difficult to fully resolve because certain dog breeds have deep ear canals that trap moisture and debris, making infections persist or recur. However, if your dog suffers persistent ear infections without an obvious cause such as ear conformation, allergies could be responsible.

Some breeds, like the Basset hound puppies, are predisposed to ear infections due to their ear shape. In cases where the ear structure doesn’t explain recurring infections, allergies may cause dermatitis around the ears, increasing infection risk.

3. Diarrhoea and Vomiting as Allergy Indicators

Many dogs occasionally experience diarrhoea or vomiting, often from environmental causes like scavenging unsuitable items. However, if these symptoms occur frequently without clear reason, they may suggest a food allergy.

Food allergies in dogs can produce a range of symptoms, but digestive upset including repeated vomiting and diarrhoea is common and should prompt veterinary investigation.

4. Snoring: Not Just a Cute Quirk

Brachycephalic breeds often snore due to their facial anatomy, but snoring can also signal allergies. Inhalant allergies, caused by airborne allergens such as pollen, can irritate and inflame the respiratory tract, including the throat and airways.

This mild inflammation may restrict airflow enough to cause your dog to snore when relaxed or asleep. Sudden snoring onset warrants veterinary assessment to check for allergy or other causes.

5. Obsessive Behaviours Linked to Allergies

Obsessive behaviours in dogs, including excessive licking of one area or chewing between the toes, are often thought to be behavioural issues. Yet, these can be attempts to soothe skin irritation caused by allergies.

Dogs may lick or chew a patch of skin until it becomes bald, sore, and inflamed. Allergies causing itchiness or discomfort are the primary suspects if such self-inflicted wounds appear, and veterinary advice is crucial to address the underlying cause.

Understanding and Managing Dog Allergies

The 2025 veterinary consensus emphasises recognising both typical and subtle allergy symptoms. Common signs include persistent itching, red or inflamed skin, hair loss, hives, recurring ear infections, watery eyes, sneezing, and gastrointestinal issues like diarrhoea and vomiting.

Less obvious signs, such as mild facial swelling, respiratory symptoms like coughing or wheezing, changes in behaviour, and obsessive grooming, also alert to allergies. Since dogs may suffer multiple concurrent allergies, thorough veterinary assessment and testing including intradermal allergen tests and dietary trials are key for diagnosis.

Early identification and treatment can improve your dog’s quality of life, reducing discomfort and preventing secondary infections or complications. Always consult a vet if your dog exhibits persistent or unusual symptoms.