I have 4 18mo old Rir hens. They have an 8x8 coop and 12x12 run. I get anywhere from 1-4 eggs a day averaging 18 week. I do not free range them due to predators. The coop and run are as predator proof as I can make it and have never lost one. I've had racoons and cats attempt entry but fail. I went away for 11 days last month and asked a neighbor kid to collect the eggs and keep an eye on things. Long story short he forgot to come by. When I arrived home there were only 4 eggs in the nesting box. I have automatic water and feed and both were working and full. I checked on the birds the next few days but left the eggs. Each night they were disappearing. As there were no broken shells or yolk mess I figured I had an egg thief. I set up cameras at both entrances to my backyard can saw nothing on them, but the eggs that are in the box at night are gone the next day. Is it possible the chickens are eating the eggs overnight without making a mess? Or is there a predator that would take eggs yet not harm the girls? I'm at a loss here. Thinking maybe someone saw the cameras and is hopping my fence instead? I'm in NY if that helps predator wise.