As soon as lambing and kidding starts I start getting calls about retained placenta and what to do.
If a female is still in the birth process be sure all the babies are delivered. On that last approach insert one 250mg Terramycin scour tablet. This is a good idea anytime you enter the uterus to assist birth.
Once beyond that point, if you notice the animal appears to be done lambing don’t enter the uterus but inject penicillin ten cc per 100 pounds of body weight subcutaneously along the rib cage. This only needs to be done once if animal feels good and is eating. Continue daily if appetite is poor and give five cc dexamethasone once.
Don’t pull or attempt to remove the placenta manually. It will be expelled in due time.
Terramycin scour tablets seem to be the most effective uterine boluses available.