Sometimes we see this type of behavior in heifers after delivering their first calf. This may be a reaction to the pain that her calf caused her during the calving process or a reaction to the pain that is a result of an engorged teat and udder that is sore and when the calf wants to nurse. You will need to monitor this closely so that the calf is not hurt. Continue to confine the dam so that the calf can nurse. Usually after some time, she will allow the calf to nurse without being confined. If she continues this behavior this may be a female that you want to cull from the herd.