Jake, can you give more information? It's very unusual for a cock bird to harm a hen, other than loss of feathers and occasional skin damage on their backs. But to hurt them to the point where they are unable to walk, is unusual. How old are they? What are they fed? Do you have roosts for them? If so, please remove the roosts. Giants are too large & heavy for roosts, and they can damage their legs just by hopping down, having the body mass that they have.
4-h - AWESOME! Looking fantastic! Quesiton - it look like the pophole door is situation OUTSIDE the pen; curious as to why you did it this way, or maybe I'm not seeing it as it is? GREAT job, sweet digs for your chooks!