Dogs lick their feet and toes for a number of reasons including boredom, allergies, foreign bodies in the toes, injuries and arthritis. Excessive licking can also cause lesions and inflammation. By gently inspecting or having your vet take a look at your dog's feet you will likely be able to determine a cause and, if necessary, a treatment.
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Boredom
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Some dogs lick their toes out of boredom. If your dog is an only pet, she may be looking for a way to pass the time when you aren't available to play or walk her. Try giving her puzzle toys, such as toys with a hidden food treat inside, when you are away; walking her more frequently; or taking her to a doggie daycare a few days a week to let off excess energy and play with other dogs.
Allergies
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Allergies are a big cause of canine toe-licking. If your dog has allergies, they can cause the skin between his toes to itch and become inflamed or swollen. If you look inside your dog's foot and don't find anything unusual except for reddened skin, allergies might be the culprit. Try administering a little anti-itch cream or gel to his feet and see if it relieves the licking. If it continues, the allergies may be more serious. Allergy tests can be done at your vet's office and medication can be prescribed for serious allergies.
Foreign Objects
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If your dog is frequently outside, she may have gotten something stuck between her toes that is causing her to lick. Gently open up her paw and check between each toe and pad. Even small things, such as tiny rocks, splinters, or bits of dried grass can cause irritation.
Injuries
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Scratches, cuts or tears to the flesh of the feet, toes or pads can also cause constant licking. Look for inflamed areas, any blood or other secretions, or open wounds in your dog's paws. Some small injuries will heal on their own: dog's saliva contains a clotting agent and an anti-bacterial agent that helps them heal quickly. However, if you see an injury that is deep, open or bleeding, take your dog to the vet. Similarly, if your dog is limping for more than a day or so, a vet's advice is in order.
Arthritis
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As dogs age, they get arthritis just like people. Their joints get hot and achy from inflammation, and this can cause them to limp and lick. If your dog's feet are swollen, warm to the touch in comparison with the rest of his body, and if he does not want to put weight on a foot, he may be developing arthritis. Arthritis treatments for most companion dogs includes an anti-inflammatory medicine and a pain-killer, both prescribed by your vet.
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