Possible Clues:

• Little piggy coverings
• Horny plates on lower digits
• On foot with sluggish types losing the head with those that need to be clipped
• Pieces of keratin at the end of one’s feet
• They may be filed and polished
• Parts of the feet
• Sit alone twiddling lower extremities
• Weird one tucked into end bits found on little piggies?
• Things pedicurists file
• Plates one put out for dogs to eat