Got an old cow, that just about always has twins. She's in labor now (hoping it's just one). I usually leave em both on her, till one gets about 10 weeks old. She just don't have the milk for two this year. When should I pull it, to raise it on a bottle? She's been a good one, but I guess I'll sell her due to age in the spring. She still gets fat, but her milk production has dropped way off.