My hubby found him. He's got a burrow about 20 feet behind the run that was hidden pretty well. The trail of feathers led right to it. That's why we never saw anything, he was coming from the blind side of the run, the camera faces the run from the opposite side of where the fox came in at and there's some tall weeds around there. It's a grey fox so he blends in really well. We're going to find all the entrances to the burrow and block them all off but 1 and then flush him out.All that can be done without seeing it in some way is guessing games... and it may change the times it will come back, they're smart and usually don't come when you expect... lock those babies up, get the camera recording, set traps and hotwire the place... good luck, I've been there too many times... :/