I have 8 heifers that I retained last year in a small barn corral. 4 of the heifers have calved, and one looks close. The heifer that is close was bagged up pretty heavy, but then I noticed that she is allowing the other's calfs nurse her. Should I seperate her or is this ok? I was wondering if her new calf won't have any colostrum or maybe the heifer won't claim her calf if she begins to adopt one of the other calfs.