What Are Dewclaws and Should You Trim Them

In day-to-day practice, dewclaws are the nails I see overgrow and snag most often, so yes — I trim them on the same schedule as the rest. You have a small decision to make: leave that high, odd nail alone because your dog never touches it to the ground, or fold it into regular nail care before it curls.

Last month I talked this through with the owner of a 4-year-old, 62-pound mixed-breed dog who came in for a bath-and-trim visit. She pointed to the short nails on the front paws and asked if the little thumbs set higher on the leg counted. They did. By day 10 after his last full trim, those two front dewclaws were already visibly longer than the other nails because pavement never filed them down, and one had started to catch on her fleece blanket. We added them to his every-three-week check, and she left with a plan to look first at the nails she could not hear clicking on the floor.

The extra toe TikTok keeps calling vestigial

A dewclaw is the short digit set higher and more to the inside of the paw. Most dogs have them on the front legs, some have them on the rear legs, and a few large breeds carry double rear dewclaws. They still have nail, quick, bone, and in front, muscle attachments that support grip and stability on turns.

That function matters. The Merck Veterinary Manual notes routine nail care as part of basic preventive care, and front dewclaws in particular still engage during running and holding a chew. Rear dewclaws vary more. Many are firmly attached. Some hang looser with less bony connection and snag more easily.

Trim them. They do not wear on pavement like the other nails, so prevention is the whole job here.

What I check before I cut

Set up for calm handling first. Good light supports safe cuts and may help maintain comfort for dogs that dislike paw handling.

Do this order. Lift the leg gently. Isolate the dewclaw with one finger. Push back loose hair so you see the quick. Snip a thin slice. Pause. Look at the cut surface. Repeat in thin slices until you see a gray-pink center on light nails or a darker, moist center on dark nails, then stop. Smooth the edge with a file if your dog tolerates it.

That thin-slice habit matters more on dewclaws because they thicken fast when skipped. For timing, I follow the same window I use in How Often Should You Trim a Dog’s Nails? — check every 2 to 3 weeks and trim what has grown. If you use a grinder, review Nail Clippers vs. Dremel for Dogs: Which One Should You Actually Buy? to match the tool to your dog’s tolerance.

A client once tried the opposite approach with a 6-year-old, 48-pound dog who hated nail time. To keep sessions short, she asked her partner to hold treats while she trimmed only the four weight-bearing nails and skipped the dewclaws. Three weeks in, the tradeoff showed. The left front dewclaw had thickened and curved toward the pad, and the dog yelped when it caught on bedding. We had to take that one shorter in two staged sessions with lots of pauses, which took longer than including it all along. Skipping felt kinder in the moment and created more handling later.

When that high nail needs extra attention

Watch for curling toward skin, cracking, limping after play, licking at one toe, or a dewclaw that wiggles loosely side to side. Those signs mean stop trimming for length and call your veterinary team. Loose rear dewclaws tear more easily, and ingrown nails can open skin to infection. Keep styptic powder nearby, press gently if you nick the quick, and keep the paw clean.

Long hair around the toe hides early overgrowth. I clear the view first, the same way I do in How to Trim the Hair Between a Dog’s Paw Pads, then decide where the quick likely sits. The VCA Hospitals trimming guide supports this conservative approach of taking small amounts and checking the nail surface, especially on dark nails where the quick is hard to see. The American Kennel Club also reminds owners that dewclaws need the same regular attention because they lack normal wear.

My edge-case dog was a 9-year-old, 18-pound terrier mix with soft, floppy rear dewclaws that barely seemed attached. By day 14 after a trim, one rear dewclaw had already hooked like a fishhook while the other nails still looked short. The owner worried removal was the only answer. It was not. We kept those two on a tighter 2-week check, trimmed only the hooked tip, and flagged them for the veterinarian to assess at the annual exam for looseness or repeated injury. Loose texture changed the schedule, not the principle.

Yes, trim them.