Off the top of my head, I think a show ACD should run around 18" at the withers whilst show Whippets are around 20-22" at the withers. This is off my head, so please correct me if I'm wrong.

If Molly is almost a year old, she should be hitting 18-20". Now how much is 12 kilos in pounds? Whippets are around 20-26 lbs, again, off the top of my head. I'm not sure how much ACDs weigh, but my guess is 40-ish. I don't know how much this is in kilos, though....

What is the texture of her coat? Now that I look closer, it really looks like this girl has quite a bit of coat. I was thinking maybe a little Sheltie? That would explain why this girl is so small!