Hi David,
I've got a couple cows in the herd that get pretty excited right after they calve. Both get especially wound up when their calf first wobbles to his feet (roaring, bellowing, raking the ground, etc). One gets so wound up, she will knock her calf off his feet, so what I usually do is isolate the cow from her calf for a couple of hours. That has seemed to be enough for them to settle down to motherhood.
On a somewhat related subject, when I'm grafting a calf or have a heifer that refuses her calf, I run her into the squeeze and give her a 1cc shot of oxytocin (spelling?). It causes uterine contractions and inhibits the cow's ability to "hold" up her milk. It also seems to give those maternal hormones a boost. Also I usually hobble the really nasty ones so they don't intimidate the calf by booting him every time he tries to have a suck. (Have had a past problem when I didn't do that by ending up with a calf that wouldn't suck unless the cow was run into the maternity pen and had her foot tied back. What a pain!).
Only exception to this is with a cow whose calf was over a month old when it died - tried to graft an orphan onto her, but she just wasn't buying what I tried to sell her. Oh well, win some, lose some.
Would love to hear everyone else's ideas...never hurts to learn a new way to skin the cat. (Speaking of which, I've never had any luck with skinning the dead calf and using it's hide on the grafter...gave that up two years ago - although some folk swear by it. I've occasionally rubbed the grafter with fresh placenta from the cow I'm trying to graft onto if she's had a still born calf...figure they go by smell, so what've I got to lose.)
Best of luck with your calf.