Related Clues:

• Dog line
• It's clipped on to show who you are
• Dog-walking need
• Lab monitor?
• Rein for Rover
• A dog may pull on one during a walk
• Item on a chain, maybe
• It may be scrutinized on a carousel
• Fido's tether
• It may be checked at a checkpoint
• Patient's wristwear
• Suitcase attachment, for short
• What a dog walker holds on to
• Airport freebie
• Aid in lost and found