Before applying the obstetrical chains to "pull" a calf during a difficult birth, a proper analysis of the situation must be made.  Wash the vulva, anus and the area in between using soap and warm water.  Pulling on a calf should only be done when the presentation and posture of the calf are normal.  Normal is defined as the "anterior presentation" with fore feet first, head resting on the limbs, and the eyes level with the knees.  Before chains are applied, be certain that the cervix is completely dilated.  To learn more about how to make this determination, check out two video tapes available from your local OSU Extension Office.   These two videos are called "Calving Management-Parturition" (VT-323) and "Calving Management-Dystocia" (VT-324).  In the second video (VT-324), Dr. Larry Rice, Professor-Emeritus, demonstrates how to check for cervical dilation. Also purchase a copy of "Calving Management" E-906, a 40-page OSU Extension Circular that thoroughly discusses working with cows and heifers before and during calving season. 

     To properly use obstetrical chains when assisting with a difficult birth, follow the example pictured below.  To attach the chain, loop it around the thin part of the leg above the fetlock.  Then, make a half hitch and tighten it below the joint and above the foot.  Make certain that the chain is positioned in such a manner that is goes over the top of  the toes.  In this way the pressure is applied so as to pull the sharp points of the calves hooves away from the soft tissue of the vaginal wall.