I am planning on adopting a small white (pic looks like maybe american eskimo dog) dog who is not spayed and estimated to weigh around 20-25 pounds. I'm informed she was recently allowed to mate with a "quite a bit larger dog", possibly a "rott mix". Does she have any chance of having a normal delivery? I called the vet and asked but the lady answering the phone said she doesn't know and she has never seen that before.