The short answer
Allergies, most of the time. Persistent paw licking is one of the earliest and most common signs of seasonal allergies in dogs. The paws are ground zero because they make direct contact with grass, pollen, and other allergens.
Allergies are the top cause
When a dog is allergic to environmental triggers like pollen, mould, or dust mites, the immune response shows up in the skin. And the paws, with their thin skin and constant ground contact, take the worst of it.
You’ll often see licking focused on the tops of the feet and between the toes. Over time this turns the fur a rusty brown colour from saliva staining. If your dog’s paws look like that, you’re not imagining the problem.
In Ontario, paw licking that starts in spring and gets worse through summer almost always points to seasonal allergies. If it happens year-round, food allergies or dust mites are worth looking into.
Other reasons dogs lick their paws
Allergies account for most cases, but not all. Other things that cause paw licking:
A foreign object or injury. Grass seeds, small thorns, or cuts between the toes can cause focused licking on a single paw. If your dog is obsessing over one foot specifically, check between the pads carefully.
Yeast or bacterial infections. These often develop as a secondary problem after weeks of licking. The moisture from constant saliva creates the perfect environment for infections to take hold. You might notice a musty smell or redness between the toes.
Ticks. Ticks like to attach between toes and around the paw pads. In Halton Region, blacklegged ticks are active from spring through fall. If you find your dog suddenly focused on one paw after a walk near Bronte Creek or through tall grass, check for ticks before assuming allergies.
Boredom or anxiety. Some dogs lick their paws out of habit when they’re understimulated. This tends to be more rhythmic and repetitive, and it usually doesn’t come with the other allergy signs like belly redness or ear infections.
When to see the vet
If the licking has gone on for more than a week or two, or if you see redness, swelling, discharge, or limping, get it looked at. Secondary infections need treatment beyond just addressing the underlying allergy.
Your vet can figure out whether this is allergies, an infection, or something structural. If allergies are the cause, treatments like Apoquel and Cytopoint work well and you should see the licking drop off within days.
Key takeaways
- Persistent paw licking is the most common early sign of seasonal allergies in dogs.
- Brown saliva staining on the paws is a reliable visual indicator.
- In Ontario, spring and summer paw licking usually points to pollen allergies.
- Check for ticks, foreign objects, and secondary infections before defaulting to allergies.
- If the licking persists more than a couple of weeks, see your vet.
References
- PetMD. “Dog Seasonal Allergies: Causes, Symptoms, and Treatment.” petmd.com
- VCA Animal Hospitals. “Allergies in Dogs.” vcahospitals.com
- VetDERM Clinic. “13 Signs Your Dog Has Pollen Allergies.” vetdermclinic.com
- AKC. “Why Does My Dog Lick Their Paws?” akc.org