mine was similar. my first loss was from a hen roosting near that large wire. coon reached in and punctured her chest cavity. it was awful. my first fix was to nail up a barrier so they could not sleep close to that wire...eventually i rebuilt the entire set up for safety and ease....it was costly....but worth it.I have been raising chickens for quite some time and have gone through many "live and learns"... Chicken wire is useless. It's meant to keep poultry in and NOTHING out. I have built my pen with hardware cloth on the bottom and welded wire for the remainder and top. Make sure there are NO gaps. You'd be surprised how small of a space a raccoon can squeeze through. With welded wire on the bottom as well, a fix can get their paw in enough to rip bird(s) right through and make a mess. But like it was said, make sure its a good quality guage and not just cheap one bc it is in fact a one time investment that will save lives.where the doors open we put big flat slate / blue stone so nothing can get in from under that opening as well. Another option would to be possible burying a large enough flat piece of wire so nothing can dig.