At what age can I put a calf, that had her mother die, back in the pasture with other cows ? I have been feeding her twice a day with a bottle bucket and keeping her in a barn stall. I could continue to feed her with the bottle bucket, but have concern that she will try and nurse from the other cows and be butted away and possibly hurt. None of the other heifers have calfs at their side at this time but will be calfing in the next couple of months.