Of course, I realize there is no doubt more than one possible cause. I have this little baby button quail chick hatched Friday that is just having the hardest time, yet trying so hard to live. He is very small and doesn't seem to be making much headway. It never "perked up" like the rest did a few hours after hatching. I've been trying my best to help him out, but I don't know if it's doing a lot of good. It does eat and drink on its own now, which is an improvement. So, my question is -- what is the real reason for this kind of thing? Genetic? Everything else is the same as its 6 hatchmates, but since I got the eggs from a breeder, I assume different parents.