Yesterday or last night something killed all 4 of my hens, I’ve had chickens for years, losing to hawks mostly, had these girls for 2 and 6 years with no incidents. My dog has been on patrol for the last 7. I have a kennel, had to have happened after i fed and I left, leaving them to free range. Then they go in coup at. Night. I came home all were dead, 2- buried. With smooth markings of moved dirt almost like it was patted down. These were orpingtons and pretty heavy. When I look at my ring camera only the dog motions the camera, so one shot nothing the next there’s a chicken in the shot. So it couldn’t have been the dog. Plus seven years she’s never hurt the girls. Also one chicken is buried in a spot pretty narrow she couldn’t have reached. Oh and my two ducks not hurt at all. Any ideas what would kill then bury? Not covering chicken all the way? I thought I heard a cat, but these are big chickens?