🐶❤️🐶 Why do dogs chew at their dewclaw? 🐶❤️🐶

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The Curious Case of the Canine Thumb: Why Dogs Chew Their Dewclaws

If you’ve ever looked down at your dog and caught them intensely nibbling on the inside of their front leg, you aren’t alone. It looks a little awkward, a bit like a person aggressively biting a hangnail, and it often leaves pet parents wondering: Of all the spots to scratch, why focus on that random, isolated little claw?

That little rogue nail is the dewclaw, essentially your dog’s version of a thumb. While it might seem like a useless evolutionary leftover, it actually serves a purpose—and when your dog starts chewing on it, they are usually trying to tell you something.

A small black and brown dog sitting on its hind legs
Photo by Amie Barron / Unsplash

The Literal "Hangnail": Overgrowth and Splits

The most common reason for dewclaw chewing is simple maintenance. Because dewclaws sit higher up on the leg, they don't touch the ground when your dog walks. This means they don't get naturally worn down by pavement or grass as the other nails do.

If left untrimmed, the dewclaw can grow long, curl back on itself, and even pierce the skin. A dog will often chew at it to:

  • Try to break off a snagged or split nail.
  • Relieve the pressure of a nail that is growing too long.
  • Groom away dirt or debris trapped in the nail bed.

A Hidden Ouchie: Injury or Tears

Because dewclaws loop out slightly from the leg, they are notoriously prone to getting caught on things—thick carpets, brambles on a hike, or the fibers of their favorite blanket.

If your dog suddenly starts licking or chewing the area frantically, they may have partially torn or fractured the nail. A torn dewclaw can be incredibly painful and bleed heavily, leading your dog to instinctively nurse the wound with their saliva.

The Dreaded Itch: Allergies and Skin Infections

Dogs don’t have hands to scratch an itch, so they use what they’ve got: their teeth. If your dog is chewing both of their dewclaws or licking their paws entirely, environmental or food allergies might be the culprit.

The skin fold around the dewclaw is also a cozy, warm environment where yeast and bacteria love to throw a party. Once an infection sets in, it becomes a vicious cycle of itching, chewing, and more irritation.

Boredom and Anxiety

Sometimes, the issue isn't physical at all. Dogs thrive on mental stimulation. If they are feeling anxious—perhaps due to a loud thunderstorm, a change in routine, or just a lack of exercise—they might turn to self-grooming as a coping mechanism. Chewing on an accessible spot like the dewclaw can become a repetitive, soothing habit born out of sheer boredom.

How to Help Your Pup

If you notice your dog paying a little too much attention to their "thumbs," here is a quick checklist to get them some relief:

What to CheckWhat to Look ForNext Steps
Nail LengthIs it curling tightly or splitting?Give it a careful trim or visit a groomer.
The SkinIs it red, swollen, or smelly?This hints at an infection; consult your vet.
The Energy LevelHas your dog been cooped up all day?Grab the leash or a puzzle toy to distract them.
A Quick Tip: If your dog winces or pulls their paw away when you gently touch the dewclaw, there’s likely a painful tear or injury inside. It’s always best to let a vet handle a torn nail, as they can safely trim away the damaged piece and provide pain relief.

Next time you see your dog having a good chew session on their leg, take it as a friendly reminder to check in on their paws. A little trim, a good walk, or a quick vet check is usually all it takes to keep those canine thumbs happy and healthy!

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