The Unearthed Arcana of a few weeks ago featured an alternate version of experience granting you a set amount of experience for every opponent defeated. And someone immediately commented about how you could just go and kill twenty chickens and gain a level. This is a very minor twist on the classical “bag of rats” rule loophole, where a character carries a sack of rodents to execute whenever they need to trigger an ability that requires killing an enemy.

I do wonder at the logistics of this. Rats need to be fed after all. And its not like you can just hit up a lab rat wholeseller.