I have a dairy heifer with an extra large bag. I nee 3 calves on her but don't have the means for this now. She won't let me milk her out. I have tried but she keeps walking side ways back and to. I don't know if I could drive her into the head gate by my self her calf 1-1/2 week old now is not making a lot of head way. What do you suggest? I am afraid she might go into mastiff. I tried to milk this eve and did it a few seconds and she began to side step and turn on me.