I agree with previous poster and your vet. Breech birth is not often a problem unless a large head becomes lodged in the birth canal, which luckily I have never had to experience. Just try to be available when the pups decide to come along in case there are any problems. Sounds like your vet is close and you are prepared for most scenarios. Best of luck to you all.
__________________  Tracy and my  S 
" If a dog will not come to you after having looked you in the face, you should go home and examine your conscience."- Woodrow Wilson |