Yep, no fun here sorry.
I could get the whole "kill them quickly enough", but the thing is, if one chicken can pop another chicken that can pop another chicken that can... You see where I'm going with this. They do it on turn one, it's not like you have any kind of time to dispatch them.
And yeah I think there's a bug because supposedly you're supposed to be able to have the choice to kill them during the dialogue with the roster.
Well... I'm having another buggy quest so I'm assuming there are still some issues with the quests.