The object must be to turn the fetus so that one extremity or the other can enter the passage, and the choice of which end to bring forward will depend on various considerations. If one end is much nearer the outlet than the other, that would naturally be selected for extraction, but if they are equidistant the choice would fall on the hind end, as having only the two limbs to deal with without any risk of complication from the head. When the head is turned upward and forward it will usually be preferable to bring up the hind limb, as, owing to the drooping of the womb into the abdomen, rotation of the fetus will usually be easier in that direction, and if successful the resulting position will be a natural posterior presentation, with the back of the calf turned toward the rump of the cow. Similarly with the croup turned upward and forward, that should be pushed on forward, and if the forefeet and head can be secured it will be a natural anterior presentation, with the back of the calf turned upward toward the rump of the cow. The womb should be injected with warm water or oil, and the turning of the calf will demand the combined action of the repeller and the hand, but in all such cases the operator has an advantage that the body of the fetus is wholly within the body of the womb, and therefore movable with comparative ease. No part is wedged into the pelvic passages as a complication. The general principles are the same as in faulty presentation fore and hind, and no time should be lost in making the manipulations necessary to bring the feet into the pelvis, lest they get inbent or otherwise displaced and add unnecessary complications. With a transverse direction of the calf, the head being turned to one side, the pressure must be directed laterally, so that the body will glide around on one side of the womb, and the extremities when reached must be promptly seized and brought into the passages. Sometimes a fortunate struggle of a live fetus will greatly aid in rectifying the position.