Related Clues:

• What you might call a dog
• Creature in Petco's logo
• Shiba Inu, e.g
• Bo or Checkers
• Retriever, for one
• Animal that can follow the second word in each of this puzzle's four theme entries
• One may be fetching
• Marley or Old Yeller
• Terrier or poodle
• Shelter rescue, perhaps
• Relentlessly follow
• Cross at obedience school?
• Typical mascot of some commando group
• Travel down at first, then up, to keep following
• Bowser or Rex