Oh, I believe you. It makes the most sense in my case. I doubt it's the construction, or I'd be finding tiny eggs all the time. I know it isn't a diet issue because mine are turned out to pasture and I give them chicken feed as well. Plus, none of the hens are displaying any health or behavioral problems. I know it's not a parasite issue because they've been treated. It wasn't a cowbird egg because it didn't look like one when I compared the two. None of my birds are too old to lay eggs, so it can't be that either. I have three first timers though, so I think you're right. I haven't seen another tiny egg since then.I don' want to dispute the other theories, but if you had some first time layers, I'm quite sure one of them was the source of the tiny egg. Her next egg will probably be normal sized.