I'm heartbroken. I have 2 broody hens who have been diligently sitting on eggs for 3 weeks. I noticed an egg disappeared last week, and chalked it up to mystery. Last night I felt one egg had a heart beat! Today, it's gone too! Reading online it sounds like I could have a snake problem? There is a good size hole outside the coop. Any ideas on how to rid the marauder? Is there another reason for the disappearing eggs?