It is difficult to be sure from the photo angle, but IMO if he is holding her by her legs/feet there is a risk of injury to her. If you haven't already done so, watch to see how she acts when he picks her up. If she demonstrates distress initially, she may just be submissive and not really enjoy this or be passive with fear.
You should explore how to catch and carry a chicken for comparison.
Will be interested in other opines.