May not stop an intruder, but will let you know there is one

Basset Hound
Group: Hound group
Size: Large
Read more

Cairn Terrier
Group: Terrier group
Size: Small
Read more

Dachshund Miniature
Group: Hound group
Size: Small
Read more

Pomeranian
Group: Toy group
Size: Toy
Read more

Schnoodle
Group: Crossbred group
Size: Small
Read more

Scottish Terrier
Group: Terrier group
Size: Small
Read more