Why Does My Dog Chew His Nails. Often, dogs chew their nails when stressed, worried, or bored. It might also be a result of injuring a nail.
Why does my dog constantly bite his nails? Dogs can bite their nails as part of the grooming process, especially if their nails are very long and uncomfortable. Claw conditions that can affect your dog may have additional symptoms of painful walking, swelling around the claws, and brittle or abnormal nails.