Sorry it happened again . Did you try to trap it?
Good luck on trapping. Over the years we have tried several traps during different seasons for foxes. So far we've caught raccoons and possums and even the rooster once (He was released.) but NO foxes. And we've used every kind of bait we can think of. Because the chickens live in Fort Knox, I don't worry about the possums and raccoons.
The minute there is the slightest chink in the armor, the fox will find it.
If anyone has any sure fire ideas or even any kind of an idea, I would like to know it.