I was thinking something you could try is to mash it up with their other favorite food and see if they begin to like it. I have not tried it, but it could work. It's worth shot.
Well, the first one and the third look like cockerels to me. The ones with the saddle could be pullets because the are going bald in the back because the cockerels are attempting to mate them. Just a thought. The second one looks like a pullet to me, but I could be wrong. Hope this helps!!!!
Even though I have no pictures......... I will be getting some laced wyandottes. I have always loved them and just waiting to get them. These forum makes me want them even more.