Skip to Primary Content

Tacoma Animal Hospital

Why Is My Dog Always Scratching? A Tacoma Vet's Guide to Pet Allergies

Dog with a Red Leash Looking Up at the Park

If your dog licks their paws every night, rubs their face on the carpet after every walk, or has patches of pink irritated skin that come and go with the seasons — you've probably Googled "why is my dog itchy" more than once. You're not alone. Allergies are one of the top five reasons pet owners bring their dogs and cats to Tacoma Animal Hospital, and they're also one of the most commonly misunderstood conditions we treat.

Here's what's actually going on, what makes the Pacific Northwest uniquely challenging for allergic pets, and how to get your dog or cat real relief.

"Is It Allergies, or Is My Dog Just Dry?" — How to Tell the Difference

Dry skin and allergies look similar but feel different to the pet. Dry skin typically causes flaking and mild scratching that improves with a fish oil supplement or a humidity boost during dry winters. Allergic pets, by contrast, are relentlessly itchy — the scratching is intense, focused, and comes back every time you stop treating it. Key signals that point toward allergy rather than simple dryness:

  • Paw licking that stains the fur reddish-brown (a classic yeast overgrowth signal secondary to allergic inflammation)

  • Recurring ear infections — more than once a year in the same ear strongly suggests an underlying allergy

  • Itching that's worst around the eyes, muzzle, armpits, groin, or between the toes

  • Symptoms that improve with antihistamines or steroids, then return when you stop

  • A pattern that correlates with seasons, new foods, or environmental changes

📋 What We See at TAH: The most common presentation we see isn't a dog who's scratching constantly — it's a dog who's been licking their left paw for three months and now has a dark stain and thickened skin between their toes. By the time owners notice the skin changes, we're already dealing with secondary yeast and bacteria on top of the allergy.

Why Tacoma and the PNW Are Particularly Tough on Allergic Pets

Living in the Pacific Northwest means your pet faces a nearly year-round allergen calendar. Our wet winters encourage mold and dust mite proliferation indoors. Spring brings tree pollen (alder and cedar are major offenders in our region). Summer adds grass pollens. And unlike drier climates where a hard freeze resets the flea population each winter, Tacoma's mild winters mean fleas remain active and viable throughout the year — making flea allergy dermatitis a four-season problem, not a summer one.

This is why we consistently recommend year-round flea prevention for Tacoma pets even if your dog "never goes outside much." Fleas hitch rides on shoes, clothing, and visiting animals. One flea on a highly allergic dog can trigger a flare that takes weeks to resolve.

PNW insight: We see more flea allergy dermatitis cases in October and November than in July — because owners stop flea prevention after summer and the fall flea surge catches them off guard.

Food vs. Environmental: The Question That Takes Patience to Answer

"Could it be food?" is one of the first things owners ask, and the answer is: maybe, but food allergies are less common than most people think (roughly 10-15% of allergic pets), and they can't be diagnosed with a blood test or a quick trial of grain-free food.

A proper food allergy diagnosis requires a strict 8-12 week hydrolyzed protein or novel protein elimination diet — every treat, every flavored medication, every bite of table food has to go. Most over-the-counter "limited ingredient" diets don't actually meet the standard because of cross-contamination in manufacturing. If you've "tried switching foods" a few times without a structured elimination protocol, you haven't ruled food out yet.

What We Can Do: Treatment Options That Actually Work

  • Cytopoint (lokivetmab) — a monthly injectable that targets the specific itch signal in dogs; most patients see 80-90% reduction in itching within a week

  • Apoquel — a daily oral medication that interrupts the itch-inflammation cycle without the side effects of long-term steroid use

  • Immunotherapy (allergy shots or sublingual drops) — the only option that retrains the immune system rather than suppressing symptoms; takes 6-12 months to reach full effect but produces lasting improvement in roughly 70% of patients

  • Targeted parasite prevention — critical foundation for any allergy management plan

  • Prescription medicated shampoos and ear treatments for secondary infections

  • Acupuncture as a complement to conventional allergy managementfor dogs with chronic skin inflammation who don't tolerate medication well, or who've plateaued on their current protocol, veterinary acupuncture can modulate immune response and reduce the inflammatory baseline. We use it as part of a broader integrative plan, not a replacement for proven therapies.

Allergies are manageable. Most of our allergy patients go from miserable to comfortable within a few weeks of starting the right plan. At Tacoma Animal Hospital, we take an integrative approach — combining conventional dermatology tools with options like acupuncture when they're the right fit for the individual patient. If your pet has been itchy for more than a month, book a dermatology-focused wellness visit and we'll build a protocol specific to them, not a generic handout.