Sorry grasscarp checked my profile and can't find your answer maybe you answered it for someone else, have looked up breeds of turkeys and can't find a Dullard
I answered it in the thread where you asked this at the end of someone else's thread, so it will be in answers you have given, rather than questions you have asked.
Of course you wont find a turkey breed called a dullard. An ignorant person can be called a turkey or a dullard among a lot of other things, so the clue is cryptic rather than factual.