If your dog won’t stop scratching, licking, or biting their skin, you’re not alone. Skin allergies are one of the most common reasons pet owners visit us at Renfrew Animal Hospital. But while a little itching now and then is normal, constant scratching can be a sign of an underlying issue that deserves attention. Let’s break down what could be causing it, how to tell the difference between normal and excessive itching, and what you can do to help your dog feel more comfortable.
When Itching Becomes A Problem
It’s normal for dogs to scratch occasionally — just like we might get an itch here or there. But if your dog is scratching multiple times a day, losing patches of fur, or developing red, irritated skin, it’s time to take a closer look. Chronic itching often leads to open sores, secondary infections, and a lot of discomfort.
At Renfrew Animal Hospital, we often see dogs that have been scratching for months before their owners realize how serious it’s become. The sooner you bring them in, the easier it is to pinpoint the cause and prevent long-term skin damage.
Common Causes Of Itchy Skin
There isn’t one simple reason behind constant itching — it can stem from several sources. Here are the most common culprits we diagnose in dogs:
1. Environmental allergies (atopy):
Just like humans, dogs can be allergic to pollen, mold, dust mites, or even grasses. Environmental allergies often cause seasonal itching — for example, a dog may scratch more in spring and fall. Common signs include red paws, ear infections, and constant licking between the toes.
2. Flea allergy dermatitis:
Even a single flea bite can trigger severe itching in sensitive dogs. The reaction isn’t to the bite itself but to the flea’s saliva. If your dog’s itching is concentrated around the tail base or hindquarters, this is a likely cause. Regular flea prevention is key — even for indoor pets.
3. Food allergies or sensitivities:
Some dogs react to certain proteins (like chicken, beef, or dairy) or grains in their diet. Food allergies typically cause persistent itching year-round, especially around the ears, face, and belly. We often recommend an elimination diet or prescription food trial to identify the trigger.
4. Yeast and bacterial infections:
When allergies disrupt the skin’s natural barrier, bacteria or yeast can multiply, worsening the itching. You may notice a greasy coat, odor, or red, inflamed patches. In these cases, treating the infection is as important as addressing the underlying allergy.
5. Dry skin or poor nutrition:
Low humidity, frequent bathing, or an unbalanced diet can dry out your dog’s skin, leading to flakes and mild itching. While less severe than allergies, it can still cause discomfort over time.
How We Diagnose The Cause
Every itchy dog is different, so our veterinarians start by examining your pet’s skin and coat closely. We may use a combination of:
- Skin scrapings or cytology to check for mites, bacteria, or yeast.
- Allergy testing to identify environmental triggers.
- Food elimination trials to find dietary sensitivities.
- Flea comb checks and preventive history reviews.
The goal is to identify the root cause rather than just soothing the symptoms. Once we know what’s causing the itch, we can create a tailored treatment plan.
Treatment Options That Work
There’s no one-size-fits-all approach to treating skin allergies. Depending on the diagnosis, your vet might recommend:
- Medicated shampoos or topical treatments to reduce inflammation and remove allergens from the coat.
- Antihistamines, corticosteroids, or newer allergy medications like Apoquel or Cytopoint for quick relief.
- Prescription diets or elimination food trials for food-related allergies.
- Flea prevention year-round to stop allergic reactions before they start.
- Fatty acid supplements to strengthen the skin barrier and reduce dryness.
In some cases, we may recommend allergy immunotherapy (allergy shots or drops) — a long-term solution that helps your dog’s immune system build tolerance to allergens over time.
Managing Allergies At Home
Treatment doesn’t stop at the vet clinic. At home, you can make small changes that have a big impact on your dog’s comfort:
- Wipe paws and coats after outdoor walks to remove pollen and dust.
- Use hypoallergenic shampoos and avoid over-bathing.
- Keep bedding clean and wash it regularly in hot water.
- Stick to a consistent flea prevention schedule, even in colder months.
- Feed a balanced diet with omega-3 fatty acids to support skin health.
When To Visit Renfrew Animal Hospital
If your dog’s itching has lasted more than a few days, or if you see redness, scabbing, hair loss, or a foul smell, it’s time to book an appointment. Allergies and infections rarely resolve on their own — and the longer they go untreated, the harder they are to manage.
At Renfrew Animal Hospital, we take a comprehensive approach to skin health. From advanced diagnostics to personalized treatment plans, we help pets find relief and owners find peace of mind.
Because when your dog finally stops scratching and starts resting comfortably again, that’s when you know they’re truly healthy.
