I have no patience or tolerance for picky eaters, whether they are chickens, other pets, or kids. I grew up poor and you ate what was on the table and were grateful you had anything at all, or else you went to bed hungry. These chickens are living the life, I've spent a lot on them already including on a feed that's nutritionally complete and good for them. That is all they get. If it's not old, moldy, full of weevils or otherwise compromised, and they still don't like it, then they can go to bed hungry. If there are health concerns, I will take that into account and examine the chicken or take them to the vet, but other than that, a healthy chicken won't starve themselves in the presence of food. I have other things to be doing with my time and money than pander to pickiness (from any species in my household).