If you said you saw the after birth come out with the pup I have no idea why he would start pulling stuff out like that.

. If the oxi worked the after birth would come out with the next pup if it was still in there. If it didn't work and there were no contractions my vet would have done a c-sec and gotten the pup. One time the pup was
right there almost out but mom just couldn't get her out. The sac was off and it was do or die so she had to really dig around with her fingers to get a hold of the pup. she could feel what she was doing with her fingers and the pup made it. It's one thing if the pups is almost out. We could see the feet and feel the sac was gone. The pup would have drown if it get out right then and there. A c-sec followed for the other pups. It's another if the pup is still in the sac and waiting to be born. You don't just go in with a tool and start pulling stuff out. what in the heck????