What is the purpose of a dog’s dewclaw?

The story behind the answer

Extra grip and stability is correct because front dewclaws are functional digits that contact the ground during sharp turns, climbing, or scrambling over uneven terrain. They’re anchored by bone and tendons, helping prevent the leg from twisting and providing traction—useful for agility dogs, herders, and sled teams. Dogs also use them to hold chews or toys.

Interesting tip: think of the front dewclaw as a “thumb for traction.” While some rear dewclaws are loosely attached and more vestigial, certain breeds (like the Great Pyrenees or Beauceron) even have double rear dewclaws as a breed trait. Contrary to myth, dewclaws aren’t for grooming or tearing prey; their main modern value is stability and control.