is there anything special i should feed my chickens to get best flavor from eggs?..and....one of biggest concerns is...disease transmission..can we get ANY type of disease or worms or ANYTHING..lol..bad from the eggs?..should i vaccinate?...and for what?, if i need to vaccinate?...just concerned about health safety...and i'd rather be safe and ask you guys than risk getting sick. Thanks, Wendy;o)