The hock is the joint between the drumstick and shank on a chicken and is the "ankle" joint of a bird.
Figure 1. Location of the hock on the leg of a chicken. Source: Jacquie Jacob, University of Kentucky.
Figure 2. Comparison of the hock joint of a chicken to the ankle joint of a human. Source: Public domain.
This is where you can find research-based information from America's land-grant universities enabled by eXtension.org
This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.