To make a long story short, my feed store put the wrong feed in a bag labeled *Starter*. I found out the starter was identical to the layer I've been feeding my duck, and the feed store confirmed that. So my five 7 week old chicks, were eating 16% layer for 2 weeks. Is 2 weeks enough to do any harm to their little bodies or kidneys? I also bought a REAL 25 pound bag of chick starter, which they are now happily scarfing down.