I traded for a bred black jersey heifer yesterday. My neighbor preg-checked her and determined that she was between 7 and 7.5 months along. Is she too far along for me to attempt to halter break her and be able to lead her? Not sure if it will put too much stress on the calf. He said that the calf is already big and active. Please advise. I would like to maybe graft calves with her.