This is the cows 3rd calf I had no reason to expect trouble, as she is wide as a D8, and when I went in to check the calfs position, there was plenty of room in there only it was a bit tight at both critters pelvic, but loose enough I figured it should have came out with a gentle pull. It helps that this cow is gentle and seems to know we were trying to help her, and she wasn't running off over the wild blue yonder, until the calf was hanging upside down and smacking her on the hocks and bawling. Then she seemed to get upset like she didn't know what to do, till she laid down and tried again to push it out again.
It seemed when my son lifted the calfs body from a "drop position" to a parallel with the ground position, ( cow was laying down) and I pulled with some old hemp type ropes ( no slipping there, un-like with the chains) the calf slowly came out. I think lifting the calfs body position must have changed the pelvic position inside, that and using hemp type rope instead of the slippery chains helped, because the rope never slipped at all that I remember, and the chains kept coming off, even though they were figure 8 shaped.
I was talking to a friend who had a hip stuck calf, and she said that some big guys got ahold of the calf and twisted it this way and that way, until it finally came out, it did some sort of damage to the back / pelvic area, and the calf never did walk right, and it ended up being butchered. However, at the time turning the calf was probably the thing to do,( maybe they were too vigorous??)
and one simply takes their chances--either get the calf out- or one has a injured/ dead cow or calf.
In this area, it isn't always possible to get a vet " at the drop of a hat" due to the remoteness of some of the areas in B.C.
so ideas / discussion on the issue is one of the best solution for problems-- seeing what others have done to either avoid the problem or solve it..