Related Clues:

• Kind of theory
• Treat like a dog?
• Preening bird, maybe
• Resident animal
• Stroke gently
• Favorite, as a theory
• Irritated state
• Word with name or project
• Creature comfort
• Teacher's favorite
• Caress
• Household member
• It's kept for companionship
• Family adoptee
• Fido or Fluffy