So sorry to hear that Bionic. Incredibly bad luck and very easily done. I've forgotten the occasional pop-hole but fortunately they are now all in an enclosure. As said, it will be back for the last one. We had one that struck 3 times. Every time I blocked off the access and it found another point of entry. First attack was 10.00am, then 2.00pm then 7.00pm, so no pattern really. We previously used to have a very large fox every night which walked all around the coops and runs to see if any had been left open. It never changed stride and followed the same route. Last time I saw it was jumping a 5 foot wall without touching it with about a foot clearance spare and it always came during the night at about the same time (I used to walk the area in the middle of the night to check for thieves). The attacks were a different fox -an urban one. We tried a trap but it wouldn't take the chicken inside. I raked the soil all around and could see it had circled the trap several times every visit.