Maybe if you both try starting the rookborn quests from the beginning the entrance that leads into rookborn from silent forest? All I know is I did get that hen quest out in Rookborn when I was doing all the questline quests out there from start to finish and the beginning questlines lead into that hen quest in rookborn and I did complete it and I got the achievement when I later did Nene the hens quest at night at lilyut lore festival event since i had already completed the rookborn hen quest. couldnt hurt to try. try all quests from beginning in rookborn leading up to that hen quest and see if you can do it and complete it then get the achievement. All I know is it worked for me so it is working correctly.I was wondering this earlier too. Have gone back and forth and it won't give me a quest in Rookborne and Lilyut doesn't have another one for me.