Sometimes the dog scratched at the door to be let in.

But instead of lying down, the big dog ran to the window and scratched at the screen.

It sounded like a dog scratching to be let in.

Here the dog stopped and scratched at the door, still whining.

Something was scratching at the kitchen door, as a dog might scratch to be let in.

Whenever there were words, a small dog scratched at the bathroom door.

It wasn't a knock, really - more like a dog scratching to be let in.

The dog sat down on the footpath and scratched his head.

The dog was still outside, growling and scratching at the door.

Wildly, the dogs were scratching at the door as if they wanted to tear through it.