pipemum, I'm sorry to hear about your loss. I have the same problem way too often since my birds are free ranging most of the time. I don't know what would have crawled through a 4 inch hole, or used a trellis to get in though. Kind of like Gallo said... If you have it secured now, and are wanting to replace your meaties, I bought 25 from McMurray a month or so ago, if you are interested I could part with however many you want. The sickening dead weight in the pit of your stomach when you find just a few feathers left from your flock doesn't get any easier each time it happens. My heart goes out to you.