I believe you have a 4 legged animal, or a bird stealing eggs. I caught my dog stealing eggs out of my egg basket. I had set it on the deck for a few moments while I tended to other yard chores. I turned around, to see her lounging on the lawn while she sucked an egg. she then trotted back up the deck steps to grab an other one. Everyone likes chicken, and apparently, every one likes eggs also.