You are correct and you are totally wrong. It depends upon the strain of birds you are dealing with. Just like any breed of any animal, if traits aren't stressed and maintained, they are down the shoot.I will be assessing for egg production - but I can get that back in three or four generations. What I am more concerned about is assessing the frame of the animal - how wide the back is, how broad the breast is. How sturdy the legs are. Because correct me if I am wrong but is the Naked neck not more of a Meat dual purpose VS. and egg dual purpose?
Don't count on getting massive egg production from a strain of NNs that have been bred for meat...you might get good production from the pullets but after the first molt...you will be lucky to get two or three eggs per bird per week.
Oh..Don't count on turning meat birds into layers in three or 4 generations either...If you want egg production, buy from a strain that has been bred for such over many generations...(No, not a sales pitch...no eggs or birds for sale).
RON