Abstract: This invention relates to an obstetrical tool for animals and, more specifically, to an improved calf puller characterized by a crank-operated winch mechanism coupled with a pair of telescoping tubes and a system of pulleys that cooperate with one another upon actuation to nearly double the distance over which the load is drawn in comparison to the overall length of the assembly in collapsed condition. The winch itself is mounted for slidable movement along the outside tube of the telescoped pair and during the first half of the retraction stroke it migrates from a close-in position adjacent the cow's hindquarters to a remote position at the far end of the assembly in collapsed condition. During the second half of the stroke, the winch and outer telescoped tube no longer move relative to one another but instead move as a unit relative to the inside tube as they slide outwardly therealong.