If you haven't encountered it yet: bad eggs really do explode. I haven't seen them explode any distance nor into tiny pieces, but we did have a nest with an egg that was turning color and I didn't think to remove it. A day or so later, I heard a muffled POP and looked to see the mama with a look of stiff panic as she sat incredibly erect on her nest. I shooed her off and found a horrible , stinky mess. Mama got a bath, we put the whole next in tripled garbage bags, and wrote off the clutch as potentially infected. Mama was not happy.