I haven't seen an egg from my lavender orpington hen since very early spring when the snow was melting. My other two hens are laying just fine, so I'm not sure what to change. They free range my yard and have access to forage all day, and I feed them high grade organic layer feed with a handful of mealworms as treats every other day or so. I have water buckets all over the place to make sure there's ample access to water. She's eating, drinking, pooping, foraging with the other hens and has no observable abnormal behaviors. I have scoured the entire yard and henhouse looking for a "stash" where she may be just dumping eggs or at random and haven't found any stray eggs. She was laying in provided layboxes and just stopped one day. She doesn't have any bugs on her, the other hens don't either. Her poops look normal. I haven't changed anything, there are no new birds, no new stresses, I'm at a loss. What's her deal?