I've been having an issue when sleeping mobs during fights. If you sleep the mob that your chocobo is targeting it will stop attacking that target, but it won't attack a different target even if you do. This mainly affect me when doing a quest and multiple mobs spawn, many times I'll sleep part of the group first and then start to attack the mob that wasn't slept. My chocobo will just stand there, doing nothing, until I attack the mob that was the target of the original sleep spell. There should be a way to tell your chocobo to attack your current target so that you can refocus it and not have it just stand there watching you get beat.