I'd like it if Aikar could make it so that the horses in the game could poop and leave little brown marks on your res from time to time. It's just not right that this isn't in there already. Horses gotta poop sometimes. Side request: give us a pooper scooper tool to pick up the poop afterwards, maybe make it a Voter's Item.
-1, my subterranean stables would smell like manure, and the last thing I need is more fecal matter in my life. Amusing suggestion though.
I mean this is probably not necessary but it could be amusing. It wouldn't be terribly difficult to do either, just find a brown head model and have it periodically drop near the horses.