Possible Clues:

• Friend of Rex?
• Barker's name, perhaps
• Generic name for a pet dog, from Latin “I trust”
• The dog ruined some of the daffodils
• Faithful pup's name
• Name meaning ''I am faithful''
• Pet targeted by the first words of this puzzle's four longest answers
• Name on a bowl, maybe
• Relative of Bowser
• Name that means 'faithful'