I woudl personally be inclined to think she is from the photo, but as others have said, it is impossible to tell from a photo, and a bitch having a phantom can show all the signs. Has she got any discharge at all or is she off her food at all?

She does need to be scanned really to confirm any pregnancy. Otherwise you risk over-feeding a bitch that isn't pregnant.

Glad you bought BOTB. What are you feeding your girl? Have you got a whel;ping box sorted etc? Do you need any help of where to get things?