I am going to give an opposite experience. Before renovating the pond, I had BG that would not come to the feed. They had never seen feed, ever. I fed the same time, same place, every day. Not like the fish I got from the hatchery after renovation, that were looking for it.
If it was me doing it again, If I didn't see the wild ones taking to feed in a week or two, I'd throw in a half dozen feed trained ones to give the oldies an idea of what to do.
