Ans: The nails of a dog need to be cut periodically to ensure that the nails do not fracture due to excessive length. Long nails can be painful for the pet, as the nails bend when the paws rest on the floor. Dogs are known to scratch and very lengthy nails can cause bruises and scratches on the areas where the dog scratches itself. Pets get traction during movement with their paws and nails; when the nails are long and overgrown, pets lost traction and find it difficult to move comfortably or at speed.