The scrawny bald fox has sarcoptic mange, many female foxes end up with it, not sure why. It's contagious so not sure how most of their male mates stay furry & bushy tailed, but neighborhood dogs may catch it. A fox with mange doesn't die quick, at least not the ones I've seen around here.
I used to free range my chickens when I was outside with them, too, but this summer my jackass neighbor started feeding 3 foxes, 2 red males & a bald, skin tailed female. The one males actually likes people now & is in my yard constantly catching mice, moles, voles & leaving piles of crap for me to try & avoid stepping in. That little shit walked up to me as watered the veggie garden, playing with moths my hose kicked up. I told the neighbor she's not doing any favors, compromising their hunting skills & making them friendly.
My chickens are safe in big pens but it sucked not being able to let them free range. I did buy a humane trap at
Tractor Supply, but foxes avoid it. Come spring I'm sure there will be many kits born in the den.
Anyway...I understand how you feel. I am hoping my other neighbor with horses does something about foxes like she did before, they carry some illnesseses very bad for horses & they run & crap where her horses are every day. I can't bring myself to shoot, but that could chage if I see a fox with a foaming rabies mouth.
Here are the large pens I built for my chickens. I started with 1 coop & 2 pens, 8x10s, to rotate chickens as they turfed, but then chicken math happened...more Roos = more individual pens lol.
If you make a 2x8 foot rectangular panels, then the 2' hardware cloth goes on real quick with the poultry staple nails that look like a "U" shape, then just screw panels together, overhead as well. If I move from here, the panel pens break down, move & reassemble easy. The hardest part was post hole digging 2 foot trench & sinking blocks so no one will dig their way in. With ongoing foxes, coyote, many hawks, raccoons & the occasional loose dogs, I need safe pens here. Hope this pen idea helps.