Dog Nail Overgrowth and Welfare | Animal Welfare Hub

Overgrown nails are an extremely common and preventable source of discomfort and pain in domestic dogs, altering gait and causing long-term joint damage.

Key Facts

Nails that touch the ground when a dog stands are too long — nails should just miss contact with a flat surface when the dog is standing.
Overgrown nails change foot posture, shifting weight back and altering the mechanics of every joint from paw to hip.
Long-term nail overgrowth is associated with chronic arthritis, particularly in older dogs.
Dewclaw nails — inner nails that do not touch the ground — are at particular risk of overgrowth and curling into the paw pad.
Regular nail maintenance from puppyhood using positive reinforcement makes the process stress-free for both dog and owner.

Welfare Considerations

Nail overgrowth is one of the most overlooked sources of chronic discomfort in domestic dogs. Unlike more dramatic welfare problems, overgrown nails cause gradual, quiet suffering — altered posture, joint stress, and occasionally paw pad penetration by curled nails. The cumulative effect over years is significant. Because many dogs resist nail trimming when first introduced, owners often avoid it — but this avoidance causes the very problem it seeks to prevent. Positive reinforcement-based nail care conditioning resolves this cycle.

What You Can Do

Check your dog's nails weekly and trim or schedule grooming when nails touch the ground on a flat surface.
Condition puppies to nail handling and trimming through gradual positive reinforcement from an early age.
Use a scratch board coated with sandpaper to allow dogs to file their own front nails as a cooperative alternative.
Pay special attention to dewclaws — check monthly for overgrowth and curling that can penetrate the skin.