I do not do a scan on my bitches. The reason is that it takes longer and I believe more a stress on the bitch. I do have the bitches palpated, and if I believe there may only be a few pups or way too many- I have a x ray done. Even then, I have only x-rayed two bitches out of the ones I have breed. One female was showing only a few signs of pregnancy, and my vet and I were both concerned she may only have a few which could be a risk of having pups too big to pass- ie needing a possible C section. ( she uh was hiding them very well.. lol..).