Had a first calf heifer calve about 6 days early. Found a wet baby calf wandering around the pen and the heifer showing no interest in the calf. Put them into a box stall by themselves and tied the heifer up. At first she did nothing but kick and jump around, but finally settled down and the calf got to nurse. For a week now we have been tying her up twice a day and standing with her so the calf can nurse, she seemed to be getting better but now is almost as bad as she was before kicking and moving around. She just has no mothering instincts and looks at the calf like she is wondering what in the world is that. Also, if the calf tries to nurse on it's own she slams it around. Every once in a while she will smell the calf but it's just like she's not getting what she's supposed to do. How long do you give them to accept the calf? We have another cow that lost her calf that we thought about trying to get the baby switched to. Any ideas?