VENTURA, 15 letters
Eddie of Frasier, for one, 6 letters
Lad or Lassie, 6 letters
Nana or Toto, 6 letters
Rover is a common name for one, 6 letters
Snoopy, e.g., 6 letters
Parts of many households, 7 letters
Cat or dog access, 7 letters
Fido's way in, maybe, 7 letters
It may be electronic, or just a manual flap, 7 letters
Pooch's in-out contraption, 7 letters
Domestic flaps?, 8 letters
Rover's portals, 8 letters
Siamese exits?, 8 letters