Possible Clues:

• Those spotted in historical Croatian region?
• *"101 ___"
• IN A DOG PARK
• See 6
• They're spotted at fire stations
• More than a hundred were spotted in film
• Dogs noted for their spotted coats
• Types spotted at Crufts?
• Black-and-white pets
• 'One Hundred and One --', 1961 animated film