if anyone else needs to know what foe is - as per Wikipedia it's a unit of energy "equal to 10^44 joules or 10^51 ergs". foe is an acronym of "[ten to the power of] Fifty-One Ergs"
Originally, the ceremony used a variety of rodents and mustelids, but over time most people agreed it made sense to standardize on a specific individual ground squirrel in Pennsylvania.