If a predator kills livestock here including chickens we are allowed to eliminate them and I have except for birds of prey. Sure there are plenty more that will move into the territory and if they kill my birds I'll eliminate them too. My flocks are well protected.I lost one of our free ranging hens to a fox a couple weeks ago. We have a couple roosters so they alerted us and we chased it away. We made sure to have our .22 close by. Early that same evening ( all the chickens were penned up) the fox returned and the roosters sounded the alarm. He didn’t live too much longer. In Alberta, trapping is illegal even if it’s a nuisance predator so the .22 was our only option to be rid of it. Unfortunately our dogs were useless and sleeping on the other side of the yard both times the fox came by .
https://www.backyardchickens.com/threads/i-have-a-fox-problem.1320127/page-3#post-21522832