Calf Puller.

Calf Puller.
Calf pullers, or fetal extractors, are mechanical devices used to deliver calves when sufficient human help is not available. They are inherently dangerous to the calf and the dam because of the excessive force they can exert. They should only be used when it has first been determined that 1) there is sufficient room in the birth canal; 2) the calf is lined up correctly; and 3) there is ample lubrication.

Drost M (1974)