Your gang is so cute, Cav! I hope they will settle down now the chooks are barricaded in their fort.
Strangely enough, my previous dog who would chase anything with fur or feathers that was smaller than her, never touched the chooks at the one place we lived where they had them. Maybe that was because the resident dog was already used to them? Or maybe she just got used to them while they were behind wire (she wasn't a digger at all) and then accepted them as part of the decor when they were finally let out to forage. There may be hope yet.