I was't sure where to post this, but it was so cute I had to share. This is from a 1601 English translation of the classical Latin author Pliny the Elder's treatise on natural history:
THE HENS of countrey houses have a certaine ceremonious religion. When they have laid an egge, they fall a trembling and quaking, and all to shake themselves. They turne about also, as in procession, to be purified, and with some festive or such-like thing, they keepe a ceremonie of hallowing, as well themselves as their egs.
I love the idea that the egg song and other post-egg craziness can be a "ceremony of hallowing" for themselves and their eggs.