What Kind Of Dog?

I just got a new chiot about 2 mo. ago, and no one (not even the vet) knows what kind of dog she is. All they know is that she is a mix. Her name is Molly (not that that would matter)and she is 23 pounds, and the vet a dit that is all she is going to grow. Give me toi best guess as to what kind of mix she she is.
Thanks!!!!!!!