I know a happy healthy flock is usually more fertile than a neglected flock. But I have an American pair and plan to get a few more hens. At this time I am only able to get a 50% fertile egg rate as determined by cracking eggs open and candling during incubation. My question is what feed is available that could possibly increase fertility in a flock? My particular situation concentrating on the rooster but for I formative purposes we can ask for flock fertility.