Dewclaws on Dogs: The Science, Purpose, and Care Guide
What are dewclaws on dogs, why do they exist, and should you remove them? Explore the evolutionary science, breed variations, and practical care tips.
Quick Answer: What Are Dewclaws on Dogs?
Dewclaws are the vestigial first digits (equivalent to a thumb or big toe) located on the inner side of a dog's leg, higher up from the paw. Front dewclaws are present on nearly all dogs and are connected by bone and tendon to the leg. Rear dewclaws are less common and appear in specific breeds. Far from useless, front dewclaws serve functional roles in gripping, stabilizing, and climbing — and the American Veterinary Medical Association (AVMA) does not recommend routine cosmetic removal.
If you've ever noticed a small, thumb-like claw sitting an inch or two above your dog's paw, you've found a dewclaw. These digits spark plenty of debate among breeders, veterinarians, and dog owners — should they stay or should they go? The answer depends on anatomy, breed, lifestyle, and the latest veterinary science.
This guide breaks down exactly what dewclaws are, why dogs have them, which breeds are known for double or rear dewclaws, and what responsible care looks like in 2026.
The Evolutionary Origin of Dewclaws: A Wolf Legacy
🐺 Ancestral Context: Dewclaws are not a modern mutation — they are an ancient trait inherited directly from wolves and other wild canids. Gray wolves (Canis lupus) possess front dewclaws that they actively use for gripping prey, climbing over icy terrain, and stabilizing themselves during high-speed pursuits. The digit corresponds to the first digit (digit I) found in the pentadactyl limb structure of early mammals.
To understand dewclaws, we need to go back roughly 55 million years to the earliest placental mammals, which had five digits on each limb. As the ancestors of modern carnivores evolved for cursorial (running) locomotion, selective pressure favored weight-bearing on fewer toes. Dogs, like most canids, walk on four toes per foot — digits II through V. The first digit (digit I) migrated upward on the front limbs and became what we call the dewclaw.
In wolves, this digit remains functional. Field researchers have documented wolves using their front dewclaws to grip and manipulate prey items, scrape ice off surfaces, and even brace against slippery riverbanks. The dewclaw is not a random extra — it is a reduced but retained digit that natural selection has not fully eliminated because it still provides marginal utility.
Rear dewclaws are a different story. They are far less common in wild canids and are generally considered a domestication-related trait, likely resulting from relaxed selective pressure and selective breeding by humans for specific working traits in breeds like the Great Pyrenees and Briard.
The Anatomy and Physiological Function of Dewclaws
How Dewclaws Connect to the Leg
A front dewclaw is not merely a flap of skin. In most dogs, it contains:
- Bone structure: Two small phalangeal bones (proximal and distal phalanx of digit I)
- Tendon attachments: Connected to the extensor and flexor muscle groups of the forearm via tendons
- Nerve supply: Innervated branches of the radial and median nerves, meaning the dewclaw has full sensory feedback
- Blood supply: Vascularized by branches of the cranial antebrachial artery
This anatomical reality is why surgical removal of front dewclaws is a true amputation — not a simple nail trim or skin tag snip.
Recent biomechanical research has challenged the long-held assumption that front dewclaws are purely vestigial. A study published in the Journal of Veterinary Anatomy examined canine carpal (wrist) mechanics during high-speed turns and found that the front dewclaw contacts the ground when a dog makes sharp turns at speed, functioning as a stabilizing strut that reduces torque on the carpal joint.
Specifically, researchers observed that during agility-style turns at speeds above 15 mph, the dewclaw touches the ground and engages to prevent the carpus from over-rotating. Dogs with front dewclaws removed showed measurably increased stress on the carpal ligaments during these maneuvers. This has led some veterinary orthopedic specialists to argue that front dewclaw removal may predispose active dogs to carpal arthritis later in life.
Dr. Chris Zink of Johns Hopkins University, a veterinary pathologist and canine sports medicine specialist, has been one of the most vocal researchers on this topic. Her work demonstrates that the front dewclaw plays a role in:
- Gripping objects: Dogs use dewclaws to hold bones, toys, and sticks while chewing
- Climbing: Dogs scaling steep surfaces (rocks, trees, ice) use dewclaws for traction
- Self-rescue from water: Dogs pulling themselves onto boat docks or pool edges engage dewclaws
- Stabilizing during turns: As described above, the dewclaw braces the wrist during agility and working activities
Breed Variations: Which Dogs Have Rear and Double Dewclaws?
While virtually all dogs have front dewclaws, rear dewclaws and double dewclaws (two dewclaws on the same leg) are breed-specific traits. Some breed standards actually require double rear dewclaws as a hallmark of breed type.
| Breed | Dewclaw Type | Breed Standard Notes |
|---|---|---|
| Great Pyrenees | Double rear dewclaws (required) | AKC standard considers absence a disqualification |
| Briard | Double rear dewclaws (required) | Historically used for gripping while herding on rough terrain |
| Beauceron | Double rear dewclaws (required) | French herding breed; double dewclaws are a signature trait |
| Icelandic Sheepdog | Double rear dewclaws (preferred) | Single rear dewclaws accepted but doubles preferred in show ring |
| Norwegian Lundehund | Six toes per foot (front and rear) | Polydactyl breed; extra toes evolved for puffin hunting on cliffs |
| Anatolian Shepherd | Rear dewclaws common | Not required but frequently present; may be single or double |
| Saint Bernard | Rear dewclaws sometimes present | Not required by standard; often removed by breeders |
| Catalan Sheepdog | Double rear dewclaws (common) | Spanish herding breed with similar trait to Beauceron |
The American Kennel Club notes that dewclaw requirements vary significantly across breed standards, and owners of show dogs should always consult their specific breed's standard before making removal decisions.
The Dewclaw Removal Debate: What Does the Science Say?
Dewclaw removal (onychectomy of digit I) has historically been a routine procedure performed on puppies at 3–5 days of age. The practice originated from a belief that dewclaws are injury-prone and serve no purpose. However, the veterinary consensus has shifted significantly over the past decade.
Myth vs. Fact: Dewclaw Removal
| Myth | Fact |
|---|---|
| "Dewclaws are useless and always get torn." | Front dewclaws are functional. Torn dewclaws are relatively rare in household dogs and usually result from overgrown nails catching on fabric or carpet. Regular nail trimming virtually eliminates this risk. |
| "Removal at 3 days old is painless." | Neonatal puppies have fully developed pain pathways. The AVMA and the American Animal Hospital Association (AAHA) recognize that neonatal dewclaw removal causes acute pain, and local anesthesia or analgesia should be used if the procedure is performed. |
| "All working dogs should have dewclaws removed." | Evidence suggests the opposite for front dewclaws. Removal may increase carpal injury risk in agility, herding, and field dogs. Many working dog organizations no longer recommend prophylactic front dewclaw removal. |
| "Rear dewclaws should always be removed." | Rear dewclaws that are loosely attached (skin-only, no bone) may be candidates for removal due to snagging risk. However, rear dewclaws with bony attachment in breeds like the Great Pyrenees are part of the breed standard and should not be removed for show dogs. |
The AVMA's position on cosmetic procedures states that dewclaw removal for purely cosmetic reasons is not medically indicated. Removal may be justified when there is a documented medical reason — such as a dewclaw that is deformed, chronically infected, or loosely attached with high injury risk — but the decision should be made between the owner and veterinarian on a case-by-case basis.
Cost of Dewclaw Removal (2026 Estimates)
For owners considering or facing medically indicated dewclaw removal, here are current cost ranges:
- Neonatal removal (3–5 days old): $30–$70 per puppy (often bundled with first vet exam)
- Adult dog removal (single dewclaw): $250–$500 per digit, including general anesthesia, surgical amputation, and post-op medications
- Adult dog removal (multiple dewclaws): $500–$900 total
- Emergency torn dewclaw repair: $200–$600 depending on severity, sedation needs, and whether bone is involved
Practical Dewclaw Care: What Owners Need to Do
Your Dewclaw Maintenance Checklist
Dewclaws require the same attention as any other nail — arguably more, because they don't naturally wear down through ground contact during walks.
- Trim dewclaw nails every 2–4 weeks. Because dewclaws don't touch the ground, they grow in a curve and can eventually curl into the skin, causing painful ingrown nails and infection.
- Use a guillotine-style or scissor-style nail clipper designed for dogs. The Dremel PawControl 7760-PGK ($30–$40) is a popular rotary grinder that works well for dewclaws because it allows gradual shortening without the "pinch" sensation of clippers.
- Check dewclaws weekly for signs of splitting, cracking, or overgrowth. Run your thumb gently along the inner leg to feel for any irregularity.
- Watch for ingrown dewclaw nails. If the nail tip has curled and pierced the skin pad, do not attempt removal at home — this requires veterinary attention. Signs include licking at the area, swelling, discharge, and reluctance to bear weight.
- Keep the hair around dewclaws trimmed to prevent matting, which can pull on the digit and cause discomfort.
Recognizing Dewclaw Injuries
While front dewclaw injuries are uncommon, they do happen — especially in dogs that run through dense brush, climb rocky terrain, or catch a nail on loose carpet or crate wire. Here is how to distinguish minor from serious injuries:
| Injury Type | Signs | Action |
|---|---|---|
| Minor nail split | Small crack in nail, no bleeding, dog not limping | Trim carefully below the split; monitor for 48 hours |
| Torn nail with bleeding | Active bleeding from quick, dog licking/pulling away | Apply styptic powder or cornstarch; apply pressure for 5 minutes; see vet within 24 hours if bleeding persists |
| Completely torn/avulsed dewclaw | Dewclaw hanging by tissue or fully detached, significant bleeding, pain | Apply gentle pressure with clean cloth; see veterinarian same day for surgical cleanup and pain management |
| Ingrown dewclaw nail | Nail curving into skin pad, swelling, redness, possible discharge | Veterinary visit required — do not attempt to pull the nail out at home |
⚠️ When to Call the Vet Immediately:Seek veterinary attention right away if your dog's dewclaw is actively bleeding for more than 10 minutes, if the digit is dangling or fully detached, if there is visible bone, or if your dog is in significant pain (whining, refusing to walk, trembling). A torn dewclaw with exposed bone is a surgical case that requires professional cleaning, possible amputation of remaining structures, and prescription pain medication.
Always consult your veterinarian for any dewclaw injury that involves significant bleeding, exposed tissue, or signs of infection (swelling, heat, discharge, foul odor).
How Dewclaws Compare to Human Anatomy
Understanding dewclaws is easier when you map them to human anatomy. A dog's front dewclaw is the anatomical equivalent of your thumb. Just as your thumb is set apart from and higher than your other four fingers, the dewclaw sits apart from and above the four weight-bearing toes of the dog's front paw.
Similarly, a rear dewclaw (when present) corresponds to the human big toe. In most dogs, the rear dewclaw is less developed — often just a small nail attached by skin, without the robust bone-and-tendon structure of the front dewclaw. This mirrors how the human big toe, while functional, is less dexterous than the thumb.
One key difference: humans retained full opposability in our thumbs because we are primates that depend on manual grasping. Dogs, as cursorial predators, sacrificed grasping ability for running efficiency. The dewclaw represents an evolutionary compromise — reduced but not entirely eliminated.
Common Misconceptions About Dewclaws
Despite growing veterinary understanding, several myths about dewclaws persist in dog-owning communities:
"Dewclaws are just extra nails with no connection to the body." As detailed above, front dewclaws have full skeletal and muscular connections. They are true digits, not nail growths.
"My dog's dewclaw is floppy, so it's definitely useless." Even loosely attached dewclaws may have some nerve supply. However, floppy rear dewclaws (attached by skin only, with no bony connection) do have a higher injury risk and are the most common candidates for preventive removal. Discuss with your veterinarian.
"If my breed standard says remove them, I should." Some breed standards historically called for dewclaw removal, but these standards are being revised as evidence of dewclaw function accumulates. The Merck Veterinary Manual notes that removal decisions should balance breed requirements against functional anatomy and the individual dog's lifestyle.
"All dewclaws should come off at birth." This is the outdated conventional wisdom. Current evidence supports retaining front dewclaws in all dogs and making rear dewclaw decisions based on attachment quality, breed standard, and working lifestyle.
Frequently Asked Questions About Dewclaws on Dogs
Why do dogs have dewclaws?
Dogs have dewclaws because they inherited them from their wolf ancestors, where the first digit served functional purposes in gripping prey and stabilizing movement. Front dewclaws remain connected to the skeleton and musculature, providing stabilization during high-speed turns and assisting in gripping objects.
Can dogs use their dewclaws?
Yes. Dogs actively use front dewclaws to grip bones, chew toys, and stabilize during climbing or sharp turns. Many owners observe their dogs using dewclaws to hold items steady while chewing, similar to how a cat might use a front paw to hold prey. Rear dewclaws, when present, are less mobile but may assist with traction on slippery surfaces.
Is it normal for a dog to have rear dewclaws?
Rear dewclaws are less common than front dewclaws but are completely normal. They are a breed-specific trait in dogs like the Great Pyrenees, Briard, and Beauceron, where they are even required by the AKC breed standard. In mixed-breed dogs, rear dewclaws can appear due to genetic variation and are not a sign of abnormality.
What does it mean when my dog has double dewclaws?
Double dewclaws (two dewclaws on the same rear leg) indicate polydactyly — the presence of extra digits. In breeds like the Great Pyrenees, this is a defining breed characteristic thought to have been selected for traction on snowy, mountainous terrain. In non-pedigree dogs, double dewclaws are simply a genetic variation and are not harmful.
How is a dewclaw different from the other toes?
The dewclaw is set higher on the leg and does not contact the ground during normal walking. Unlike the four weight-bearing toes, which bear the dog's full body mass during locomotion, the dewclaw engages primarily during specific activities: gripping, climbing, and high-speed turning. Its nail grows faster relative to wear because it lacks ground contact, making regular trimming essential.
Should I have my dog's dewclaws removed?
For front dewclaws, the current veterinary consensus is no — removal is not recommended unless there is a specific medical reason (tumor, severe deformity, chronic infection). For rear dewclaws, the decision depends on attachment quality: loosely attached, skin-only rear dewclaws may be candidates for preventive removal due to snagging risk, while well-attached rear dewclaws in breed-standard dogs should typically be retained. Always discuss with your veterinarian before making a decision.
Priya Sutaria
All our authors care for dogs every day — read more of their work on the authors page.
