in a world where humans became extinct and animals evolved to act like humans over the millennia :

It was a sunny Sunday — a beautiful day for a Holy Mass for all Catholic animals — so Paco, the priest dog, calmly organized everything. He seemed quite happy today! The church was pretty organized and clean, even though it was a little early and Mass hadn't started yet. Only the sound of Paco's hind legs walking from there to here could be heard in the church.