Which Woof?

I've been doing a bit of drawing this week, trying to come up with an 'Arty Dog'.   Not sure what he/she should look like yet, but here are a few sketches.

Thought this one looked a bit sad.

Had to have one scratching.

And here's a couple that Miss Beatie did.

Not sure which way I'm heading yet, just thought I'd see what others out there in blogland thought?