Just curious, different parts of the country have so many different ways of doing things. I do it like my Grandpa and Dad did. We keep the heifers in a small pasture, about 10 acres. If we see them having trouble they are easily moved to a corral from there, then into a very small pen, 20 by 20 feet or so. Throw a rope on her and snub her up to a post, two wraps around the post without overlapping the rope. If the rope overlaps and she goes down, you either have to cut the rope or she strangles. I put nylon straps, not chains, on the calf's feet and pull by hand at first. A real tough one I have a puller like the vet uses. If she goes down we just give her plenty of slack on the rope and let her lay down, pull when she pushes. Haven't had to pull one for a looooong time, knock on wood!