Thank you and I will read both those links. My feed is all good. My chickens get Purina Layena and once a week get a mix of BOSS, calf manna and scratch. They also get extras such as fresh veggies, scrambled egg and occasional yogurt and cottage cheese. About the diseases, i did have a little respiratory thing go through my flock a month ago but my local state poultry commission ran tests and came out negative for about 5 things they tested for. This girl was not in that coop with the ones that were sick. She and a couple others have been separated in a breeder pen for a while.