I have had a run of the same thing the last couple of years. I would bring chicks home,keeping them in a cage shielded from drafts,off the floor,on clean towels to avoid wood dust, with temp at an even 90 degrees to start,plenty of room to move about,in and out from under the heat lamp to avoid chilling or overheating,clean food and water,etc. They would be fine at first,then after anywhere from a week or two or three,I would start losing them. I've raised chicks for years doing this,and,up until several years ago, rarely,if ever lost one.And most all,which I still have a good number of, lived or are still living,at least a decade.But the last couple of years,things suddenly changed-I would lose nearly all of them,the oldest living little more than a year.I don't understand this either,like something has changed.Because I was always able to raise them successfully before,now I'm afraid to try anymore.The only real success I have had,is when hatched them from the mother,not store bought.(All but two of my geese are home-born and raised,so are my ducks-no problem.) One of the chicks raised this way lived to be 14-1/2 years old-well over 100 in human years! I don't know what has changed the past several years,except the crazy erratic weather patterns in the spring,when the chicks are shipped-maybe being subjected to the weather changes has something to do with it.Anybody else have any ideas?