Possible Clues:

• Spot watcher?: Abbr.
• Stray home, briefly
• Labrador retriever, for short?
• Adoption agcy.?
• Furry friend friends (Abbr.)
• Pet protectors' org.
• Anti-cruelty org.
• Org. offering creature comforts?
• Dog's best friend? abbr.
• Animal caretakers, for short