The last is quite nice as far as the dog is concerned, a bit more DOF would have been nice.
The background is horrible though. It doesn't take too much effort to set up a sheet in background and a couple of pillows for the dog to sit on which would make the result a lot nicer IMO
Very cute pup! I quite like 2, 4, 5, and 7. #2 is probably my favorite, but I do wish (1) it were just a smidgen brighter and (2) Trixie's left ear wasn't flipped back.