There is something about spring that makes it feel like a fresh start. The days get longer, the garden comes back to life, and dogs have a very particular kind of energy that only shows up when the weather finally turns. For a lot of pet owners, though, spring also marks the beginning of something less welcome: the itching season.
Seasonal allergies in dogs and cats are more common than most people realise, and they are increasingly common compared to even a decade ago. If your pet has ever spent the warmer months paw licking, ear scratching, rubbing their face along the carpet, or breaking out in rashes that seem to appear from nowhere, you have probably wondered why spring in particular seems to set them off, and what, if anything, you can do about it.
The answers are more interesting, and more actionable, than most people expect.
Seasonal allergies in pets rarely look the way most people expect. Unlike humans, who tend to sneeze and get watery eyes, dogs and cats most commonly express allergic reactions through their skin. If your pet is itching more as the weather warms up, that is the clue worth following.
Why spring specifically?
Spring is botanically ambitious. In a matter of weeks, grasses, trees, and weeds that have been dormant all winter explode back into growth and release enormous quantities of pollen into the air. In Australia, the major culprits include ryegrass, kikuyu, couch, Paterson's curse, and a range of native flowering trees. The pollen count in spring can be dramatically higher than at any other time of year, and those particles are small enough to settle on fur, skin, and paws, penetrate the skin barrier, and trigger an immune response.
At the same time, moulds that thrive in damp, warming conditions become more active. Dust mites, which are present year-round, tend to spike in spring as humidity increases. And pets spend more time outdoors, which simply increases their exposure to all of it.
For a pet whose immune system is already sensitised to one or more of these allergens, spring can feel like the system gets switched on and never quite switched off again.
Why it shows on the skin rather than in sneezing
This is the part that surprises most owners. When humans are exposed to airborne allergens, the reaction tends to show up in the respiratory tract: runny nose, itchy eyes, sneezing. In dogs and cats, allergic reactions work differently. When the immune system encounters an allergen, IgE antibodies trigger mast cells to release histamine and other inflammatory chemicals, and in dogs and cats this response most commonly manifests as skin inflammation. The result is predominantly cutaneous and it shows up in the skin.
What this looks like in practice varies, but common presentations include:
- Persistent paw licking or chewing, often leaving the paws stained rust or pink from saliva
- Scratching at the ears, face, armpits, groin, or belly, areas where the skin is thinner and more reactive
- Red, inflamed, or hot skin, particularly in skin folds
- Recurring ear infections that clear up with antibiotics but come straight back
- Hot spots, which are moist, painful patches of skin that develop quickly and seem to appear from nowhere
- Generalised itching that seems worse after time outdoors or walks through grass
Some pets also show respiratory signs; a small proportion of dogs do sneeze, have watery eyes, or develop a reverse sneeze pattern in response to pollen. But if your pet's primary symptom is itching and skin inflammation, seasonal environmental allergies should be high on your list of possibilities.
The gut connection most people miss
Here is where it gets really interesting, and where nutrition becomes central to the conversation rather than peripheral to it.
Not every dog or cat exposed to spring pollen develops allergies. Some cruise through the season without so much as a scratch. Others are miserable from September through to January. Why the difference?
A significant part of the answer lies in the gut. The skin and digestive tract are closely connected: when the gut is not functioning well, toxins that should be eliminated instead accumulate in the bloodstream, and the skin is one of the first places this shows up. The microbiome, the community of bacteria, fungi, and other microorganisms that live in your pet's digestive tract, plays a direct role in regulating immune responses, including the inflammatory reactions that drive allergic disease.
A healthy, diverse microbiome supports a balanced, measured immune response. When the microbiome is depleted or imbalanced, a state called dysbiosis, the immune system can become dysregulated and far more likely to over-react to allergens. In simple terms: a pet with a compromised gut is more likely to over-react to allergens than one with a robust, balanced microbial community.
This is why two pets living in the same household, eating the same food, and going on the same walks can have completely different allergy profiles. It is not random. It is an immune system that has been shaped over time by everything that has gone into, and been left out of, the diet.
I regularly see pets whose seasonal allergy symptoms improve significantly once gut health is addressed, even without any change in their environment. The skin is the symptom. The gut is often the root.
When food and environment overlap
Spring also complicates the picture in another way that's worth understanding: it can unmask food sensitivities that were previously subclinical.
Imagine your pet has a mild sensitivity to a protein in their food, say chicken or beef. On its own, that sensitivity might not cause obvious symptoms because the total load on the immune system is manageable. Add a high pollen count on top of it, and suddenly the total immune burden exceeds the threshold. Symptoms appear. The owner, understandably, attributes it entirely to seasonal allergies.
This is why the spring flare-up is sometimes a food problem that was already there, just waiting for environmental pressure to push it over the edge. It also explains why some pets seem to respond only partially to antihistamines or short courses of steroids; the medication addresses one part of the picture while the other remains untouched.
Distinguishing between environmental and food-driven allergies, and identifying the overlap, is one of the most important things a thorough naturopathic consultation addresses. It's not always one or the other. Frequently it's both.
What actually helps
There is no single answer here, because every pet is different. But the most effective approaches I see tend to work on several levels at once, rather than simply managing the symptom.
Support the gut first
A species-appropriate probiotic, one formulated specifically for dogs or cats rather than repurposed from human supplements, is one of the most consistently useful interventions for allergic pets. Supporting the microbiome helps recalibrate the immune response over time. This is not a quick fix: it takes weeks to months to see meaningful change, which is exactly why starting in early spring or even late winter gives you the best chance of making a difference before symptoms peak.
Prebiotic fibre through foods like cooked pumpkin, sweet potato, or chicory helps feed beneficial bacteria and supports the integrity of the gut lining. A compromised gut lining (sometimes called leaky gut) allows particles to cross into the bloodstream that shouldn't be there, and this is one of the pathways through which allergic sensitisation can worsen over time.
Use anti-inflammatory nutritional support
Marine omega-3 fatty acids (EPA and DHA from fish or algae) have some of the strongest evidence for reducing skin inflammation in allergic pets. They work by altering the type of inflammatory mediators the body produces, shifting the balance away from highly inflammatory compounds toward less reactive ones. The key is dose and quality; the amounts found in most commercial pet foods are far too low to have a therapeutic effect.
Quercetin is another compound worth knowing. Found naturally in foods like capers, apples, and elderberries, quercetin acts as a natural antihistamine and mast cell stabiliser that helps reduce the release of histamine that drives that itch-scratch cycle. It works best as part of a broader anti-inflammatory approach rather than as a standalone supplement, and it pairs particularly well with marine omega-3.
Look honestly at the diet
If your pet is eating the same food they've been on for two, three, or four years, and they're developing seasonal symptoms that seem to be getting worse each year, the food is worth looking at. Repeated, long-term exposure to the same protein source is one of the most common drivers of food sensitivity development. Rotating protein sources, reducing ultra-processed ingredients, and increasing the proportion of whole, recognisable foods in the diet can all make a genuine difference.
For cats in particular, many commercial diets are far too high in carbohydrates for their obligate carnivore physiology. Chronic carbohydrate load creates metabolic stress that shows up in the skin and immune system. Moving toward a higher-protein, lower-carbohydrate approach is often one of the most impactful changes a cat owner can make.
Reduce the total load where you can
While you can't control what's in the air, you can reduce the total allergen burden your pet is carrying. After walks, wiping down your dog's paws and belly, the areas most likely to have picked up pollen, can meaningfully reduce the amount that gets absorbed through the skin. A quick rinse after heavy outdoor activity in peak pollen season is worth more than most people give it credit for.
Also worth considering: conventional flea treatments, garden chemicals, household cleaning products, and synthetic fragrances all add to the immune and toxic load your pet's body is managing. Reducing these where practical gives the immune system more capacity to cope with the environmental load it can't avoid.
When to get help
If your pet has been through multiple courses of antihistamines or steroids and the symptoms return each season, that's a signal that the underlying drivers haven't been identified or addressed. Short-term symptom management has its place; there are times when your pet is genuinely miserable and needs relief right now, but it doesn't change what's happening underneath.
A naturopathic approach looks at the whole picture: the gut, the diet, the immune pattern, the history of antibiotic or steroid use, the environmental exposures, and the individual animal in front of you. It's not about replacing veterinary care. It's about finding the root cause so that each spring, the picture is a little better than the last.
If this sounds like your pet, the one who starts scratching in September, whose ears flare up every year, or who has been on and off medications for longer than you'd like, I'd love to help you figure out what's actually going on and build a plan that works with their body rather than against it.
Jessica Rice
Bachelor of Veterinary & Wildlife Science (Hons) · Animal Naturopath & Nutritionist · 20+ years veterinary nursing experience
