Related Clues:

• Dog's woe
• Pet parasites
• Bloodsucking insect
• Cause of some head-scratching
• A pet collar repels them
• Pediculicide's target
• Evil intent
• Canine woes
• Head residents?
• Pet problem
• Cause of head-scratching, perhaps
• Fumigation targets, sometimes
• Pet collar targets
• Students may be searched for them in grade school
• Grade-schooler's woe