I have had a couple of fox over the years kill some of my birds so I eliminated them. Once they kill they will be back for more. Since I have seen more fox on my property but they haven't messed with my birds. If they do I will eliminate them. One fox dug under a gate to one of the pens and killed several birds and dragged them out under the gate. Now I have concrete under the gates. Another fox killed my most special bird while she was dust bathing. I was out but got distracted when the fox sneaked in and grabbed her. Both incidents were during the day. My pens are all covered to protect the birds from aerial predators. I have electric wire around my coops and pens. You can teach your kids not to touch the wire and if they do they will learn not do it again. I have touched mine when I have been working around the coops and have forgotten to turn it off. Fox are not endangered. Good luck...