Diet definitely makes a huge difference
. I don't understand the vegetarian diet for a chick. Mine eat mice, bugs, and any other poor creature small enough to fit in their mouth! A colorful diet equals a healthy bird. I'll be playing more with my birds diets soon. I also agree about keeping breeding O-natural'. I like nature to do its business. If I have to lift their skirts and do their dirty work I'm just going to suck it up and track down a new rooster. Thankfully I haven't had the fertility problems many have been dealing with.
@Cory,
If he has the window that should be adequate light for them. Do you see them breeding or never caught them? I would try spoiling them a bit and give them some treats and try some of the cat food. If that doesn't work another thing you could try is pair him with another hen for a while. It should be a hen you have gotten confirmed fertile eggs from before and see if any are fertile while he is breeding her. One other option is letting him see another rooster ( if he can't already). Usually If you have another rooster breeding a hen the other will breed with his hen as a showing off/ I'm better than you type thing. Silver laced wyandottes often have a lower sperm count but if they breed often enough it doesn't really show up as a problem. All of my roosters can see each other and I catch them often breeding because they taught the other roosters who want his hens. Keeps them on their feet and hormonal lol.